398236720

素因数分解:

$2^4\times 5^1\times 7^3\times {\mathrm{23}}^1\times {\mathrm{631}}^1$

素因数の和:688

約数の個数: 160

約数和(自身を含む): 1128499200

約数和(自身を除く): 730262480

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 23, 28, 35, 40, 46, 49, 56, 70, 80, 92, 98, 112, 115, 140, 161, 184, 196, 230, 245, 280, 322, 343, 368, 392, 460, 490, 560, 631, 644, 686, 784, 805, 920, 980, 1127, 1262, 1288, 1372, 1610, 1715, 1840, 1960, 2254, 2524, 2576, 2744, 3155, 3220, 3430, 3920, 4417, 4508, 5048, 5488, 5635, 6310, 6440, 6860, 7889, 8834, 9016, 10096, 11270, 12620, 12880, 13720, 14513, 15778, 17668, 18032, 22085, 22540, 25240, 27440, 29026, 30919, 31556, 35336, 39445, 44170, 45080, 50480, 58052, 61838, 63112, 70672, 72565, 78890, 88340, 90160, 101591, 116104, 123676, 126224, 145130, 154595, 157780, 176680, 203182, 216433, 232208, 247352, 290260, 309190, 315560, 353360, 406364, 432866, 494704, 507955, 580520, 618380, 631120, 711137, 812728, 865732, 1015910, 1082165, 1161040, 1236760, 1422274, 1625456, 1731464, 2031820, 2164330, 2473520, 2844548, 3462928, 3555685, 4063640, 4328660, 4977959, 5689096, 7111370, 8127280, 8657320, 9955918, 11378192, 14222740, 17314640, 19911836, 24889795, 28445480, 39823672, 49779590, 56890960, 79647344, 99559180, 199118360, 398236720]

約数ペア:

[(1, 398236720), (2, 199118360), (4, 99559180), (5, 79647344), (7, 56890960), (8, 49779590), (10, 39823672), (14, 28445480), (16, 24889795), (20, 19911836), (23, 17314640), (28, 14222740), (35, 11378192), (40, 9955918), (46, 8657320), (49, 8127280), (56, 7111370), (70, 5689096), (80, 4977959), (92, 4328660), (98, 4063640), (112, 3555685), (115, 3462928), (140, 2844548), (161, 2473520), (184, 2164330), (196, 2031820), (230, 1731464), (245, 1625456), (280, 1422274), (322, 1236760), (343, 1161040), (368, 1082165), (392, 1015910), (460, 865732), (490, 812728), (560, 711137), (631, 631120), (644, 618380), (686, 580520), (784, 507955), (805, 494704), (920, 432866), (980, 406364), (1127, 353360), (1262, 315560), (1288, 309190), (1372, 290260), (1610, 247352), (1715, 232208), (1840, 216433), (1960, 203182), (2254, 176680), (2524, 157780), (2576, 154595), (2744, 145130), (3155, 126224), (3220, 123676), (3430, 116104), (3920, 101591), (4417, 90160), (4508, 88340), (5048, 78890), (5488, 72565), (5635, 70672), (6310, 63112), (6440, 61838), (6860, 58052), (7889, 50480), (8834, 45080), (9016, 44170), (10096, 39445), (11270, 35336), (12620, 31556), (12880, 30919), (13720, 29026), (14513, 27440), (15778, 25240), (17668, 22540), (18032, 22085)]