21981480

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{311}}^1$

素因数の和:375

約数の個数: 128

約数和(自身を含む): 71884800

約数和(自身を除く): 49903320

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 19, 20, 24, 30, 31, 38, 40, 57, 60, 62, 76, 93, 95, 114, 120, 124, 152, 155, 186, 190, 228, 248, 285, 310, 311, 372, 380, 456, 465, 570, 589, 620, 622, 744, 760, 930, 933, 1140, 1178, 1240, 1244, 1555, 1767, 1860, 1866, 2280, 2356, 2488, 2945, 3110, 3534, 3720, 3732, 4665, 4712, 5890, 5909, 6220, 7068, 7464, 8835, 9330, 9641, 11780, 11818, 12440, 14136, 17670, 17727, 18660, 19282, 23560, 23636, 28923, 29545, 35340, 35454, 37320, 38564, 47272, 48205, 57846, 59090, 70680, 70908, 77128, 88635, 96410, 115692, 118180, 141816, 144615, 177270, 183179, 192820, 231384, 236360, 289230, 354540, 366358, 385640, 549537, 578460, 709080, 732716, 915895, 1099074, 1156920, 1465432, 1831790, 2198148, 2747685, 3663580, 4396296, 5495370, 7327160, 10990740, 21981480]

約数ペア:

[(1, 21981480), (2, 10990740), (3, 7327160), (4, 5495370), (5, 4396296), (6, 3663580), (8, 2747685), (10, 2198148), (12, 1831790), (15, 1465432), (19, 1156920), (20, 1099074), (24, 915895), (30, 732716), (31, 709080), (38, 578460), (40, 549537), (57, 385640), (60, 366358), (62, 354540), (76, 289230), (93, 236360), (95, 231384), (114, 192820), (120, 183179), (124, 177270), (152, 144615), (155, 141816), (186, 118180), (190, 115692), (228, 96410), (248, 88635), (285, 77128), (310, 70908), (311, 70680), (372, 59090), (380, 57846), (456, 48205), (465, 47272), (570, 38564), (589, 37320), (620, 35454), (622, 35340), (744, 29545), (760, 28923), (930, 23636), (933, 23560), (1140, 19282), (1178, 18660), (1240, 17727), (1244, 17670), (1555, 14136), (1767, 12440), (1860, 11818), (1866, 11780), (2280, 9641), (2356, 9330), (2488, 8835), (2945, 7464), (3110, 7068), (3534, 6220), (3720, 5909), (3732, 5890), (4665, 4712)]