21420390

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{73}}^1\times {\mathrm{9781}}^1$

素因数の和:9864

約数の個数: 32

約数和(自身を含む): 52118496

約数和(自身を除く): 30698106

約数列:

[1, 2, 3, 5, 6, 10, 15, 30, 73, 146, 219, 365, 438, 730, 1095, 2190, 9781, 19562, 29343, 48905, 58686, 97810, 146715, 293430, 714013, 1428026, 2142039, 3570065, 4284078, 7140130, 10710195, 21420390]

約数ペア:

[(1, 21420390), (2, 10710195), (3, 7140130), (5, 4284078), (6, 3570065), (10, 2142039), (15, 1428026), (30, 714013), (73, 293430), (146, 146715), (219, 97810), (365, 58686), (438, 48905), (730, 29343), (1095, 19562), (2190, 9781)]