19953480

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{257}}^1\times {\mathrm{647}}^1$

素因数の和:918

約数の個数: 64

約数和(自身を含む): 60186240

約数和(自身を除く): 40232760

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120, 257, 514, 647, 771, 1028, 1285, 1294, 1542, 1941, 2056, 2570, 2588, 3084, 3235, 3855, 3882, 5140, 5176, 6168, 6470, 7710, 7764, 9705, 10280, 12940, 15420, 15528, 19410, 25880, 30840, 38820, 77640, 166279, 332558, 498837, 665116, 831395, 997674, 1330232, 1662790, 1995348, 2494185, 3325580, 3990696, 4988370, 6651160, 9976740, 19953480]

約数ペア:

[(1, 19953480), (2, 9976740), (3, 6651160), (4, 4988370), (5, 3990696), (6, 3325580), (8, 2494185), (10, 1995348), (12, 1662790), (15, 1330232), (20, 997674), (24, 831395), (30, 665116), (40, 498837), (60, 332558), (120, 166279), (257, 77640), (514, 38820), (647, 30840), (771, 25880), (1028, 19410), (1285, 15528), (1294, 15420), (1542, 12940), (1941, 10280), (2056, 9705), (2570, 7764), (2588, 7710), (3084, 6470), (3235, 6168), (3855, 5176), (3882, 5140)]