20308540

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{53}}^1$

素因数の和:116

約数の個数: 144

約数和(自身を含む): 55847232

約数和(自身を除く): 35538692

約数列:

[1, 2, 4, 5, 7, 10, 14, 17, 20, 23, 28, 34, 35, 46, 49, 53, 68, 70, 85, 92, 98, 106, 115, 119, 140, 161, 170, 196, 212, 230, 238, 245, 265, 322, 340, 371, 391, 460, 476, 490, 530, 595, 644, 742, 782, 805, 833, 901, 980, 1060, 1127, 1190, 1219, 1484, 1564, 1610, 1666, 1802, 1855, 1955, 2254, 2380, 2438, 2597, 2737, 3220, 3332, 3604, 3710, 3910, 4165, 4505, 4508, 4876, 5194, 5474, 5635, 6095, 6307, 7420, 7820, 8330, 8533, 9010, 10388, 10948, 11270, 12190, 12614, 12985, 13685, 16660, 17066, 18020, 19159, 20723, 22540, 24380, 25228, 25970, 27370, 31535, 34132, 38318, 41446, 42665, 44149, 51940, 54740, 59731, 63070, 76636, 82892, 85330, 88298, 95795, 103615, 119462, 126140, 145061, 170660, 176596, 191590, 207230, 220745, 238924, 290122, 298655, 383180, 414460, 441490, 580244, 597310, 725305, 882980, 1015427, 1194620, 1450610, 2030854, 2901220, 4061708, 5077135, 10154270, 20308540]

約数ペア:

[(1, 20308540), (2, 10154270), (4, 5077135), (5, 4061708), (7, 2901220), (10, 2030854), (14, 1450610), (17, 1194620), (20, 1015427), (23, 882980), (28, 725305), (34, 597310), (35, 580244), (46, 441490), (49, 414460), (53, 383180), (68, 298655), (70, 290122), (85, 238924), (92, 220745), (98, 207230), (106, 191590), (115, 176596), (119, 170660), (140, 145061), (161, 126140), (170, 119462), (196, 103615), (212, 95795), (230, 88298), (238, 85330), (245, 82892), (265, 76636), (322, 63070), (340, 59731), (371, 54740), (391, 51940), (460, 44149), (476, 42665), (490, 41446), (530, 38318), (595, 34132), (644, 31535), (742, 27370), (782, 25970), (805, 25228), (833, 24380), (901, 22540), (980, 20723), (1060, 19159), (1127, 18020), (1190, 17066), (1219, 16660), (1484, 13685), (1564, 12985), (1610, 12614), (1666, 12190), (1802, 11270), (1855, 10948), (1955, 10388), (2254, 9010), (2380, 8533), (2438, 8330), (2597, 7820), (2737, 7420), (3220, 6307), (3332, 6095), (3604, 5635), (3710, 5474), (3910, 5194), (4165, 4876), (4505, 4508)]