20977280

素因数分解:

$2^7\times 5^1\times {\mathrm{73}}^1\times {\mathrm{449}}^1$

素因数の和:541

約数の個数: 64

約数和(自身を含む): 50949000

約数和(自身を除く): 29971720

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 73, 80, 128, 146, 160, 292, 320, 365, 449, 584, 640, 730, 898, 1168, 1460, 1796, 2245, 2336, 2920, 3592, 4490, 4672, 5840, 7184, 8980, 9344, 11680, 14368, 17960, 23360, 28736, 32777, 35920, 46720, 57472, 65554, 71840, 131108, 143680, 163885, 262216, 287360, 327770, 524432, 655540, 1048864, 1311080, 2097728, 2622160, 4195456, 5244320, 10488640, 20977280]

約数ペア:

[(1, 20977280), (2, 10488640), (4, 5244320), (5, 4195456), (8, 2622160), (10, 2097728), (16, 1311080), (20, 1048864), (32, 655540), (40, 524432), (64, 327770), (73, 287360), (80, 262216), (128, 163885), (146, 143680), (160, 131108), (292, 71840), (320, 65554), (365, 57472), (449, 46720), (584, 35920), (640, 32777), (730, 28736), (898, 23360), (1168, 17960), (1460, 14368), (1796, 11680), (2245, 9344), (2336, 8980), (2920, 7184), (3592, 5840), (4490, 4672)]