21438640

素因数分解:

$2^4\times 5^1\times {\mathrm{73}}^1\times {\mathrm{3671}}^1$

素因数の和:3757

約数の個数: 40

約数和(自身を含む): 50541408

約数和(自身を除く): 29102768

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 73, 80, 146, 292, 365, 584, 730, 1168, 1460, 2920, 3671, 5840, 7342, 14684, 18355, 29368, 36710, 58736, 73420, 146840, 267983, 293680, 535966, 1071932, 1339915, 2143864, 2679830, 4287728, 5359660, 10719320, 21438640]

約数ペア:

[(1, 21438640), (2, 10719320), (4, 5359660), (5, 4287728), (8, 2679830), (10, 2143864), (16, 1339915), (20, 1071932), (40, 535966), (73, 293680), (80, 267983), (146, 146840), (292, 73420), (365, 58736), (584, 36710), (730, 29368), (1168, 18355), (1460, 14684), (2920, 7342), (3671, 5840)]