21555440

素因数分解:

$2^4\times 5^1\times {\mathrm{73}}^1\times {\mathrm{3691}}^1$

素因数の和:3777

約数の個数: 40

約数和(自身を含む): 50816688

約数和(自身を除く): 29261248

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 73, 80, 146, 292, 365, 584, 730, 1168, 1460, 2920, 3691, 5840, 7382, 14764, 18455, 29528, 36910, 59056, 73820, 147640, 269443, 295280, 538886, 1077772, 1347215, 2155544, 2694430, 4311088, 5388860, 10777720, 21555440]

約数ペア:

[(1, 21555440), (2, 10777720), (4, 5388860), (5, 4311088), (8, 2694430), (10, 2155544), (16, 1347215), (20, 1077772), (40, 538886), (73, 295280), (80, 269443), (146, 147640), (292, 73820), (365, 59056), (584, 36910), (730, 29528), (1168, 18455), (1460, 14764), (2920, 7382), (3691, 5840)]