20503980

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{16273}}^1$

素因数の和:16295

約数の個数: 72

約数和(自身を含む): 71084832

約数和(自身を除く): 50580852

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 60, 63, 70, 84, 90, 105, 126, 140, 180, 210, 252, 315, 420, 630, 1260, 16273, 32546, 48819, 65092, 81365, 97638, 113911, 146457, 162730, 195276, 227822, 244095, 292914, 325460, 341733, 455644, 488190, 569555, 585828, 683466, 732285, 976380, 1025199, 1139110, 1366932, 1464570, 1708665, 2050398, 2278220, 2929140, 3417330, 4100796, 5125995, 6834660, 10251990, 20503980]

約数ペア:

[(1, 20503980), (2, 10251990), (3, 6834660), (4, 5125995), (5, 4100796), (6, 3417330), (7, 2929140), (9, 2278220), (10, 2050398), (12, 1708665), (14, 1464570), (15, 1366932), (18, 1139110), (20, 1025199), (21, 976380), (28, 732285), (30, 683466), (35, 585828), (36, 569555), (42, 488190), (45, 455644), (60, 341733), (63, 325460), (70, 292914), (84, 244095), (90, 227822), (105, 195276), (126, 162730), (140, 146457), (180, 113911), (210, 97638), (252, 81365), (315, 65092), (420, 48819), (630, 32546), (1260, 16273)]