21325330

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{4001}}^1$

素因数の和:4062

約数の個数: 32

約数和(自身を含む): 42357168

約数和(自身を除く): 21031838

約数列:

[1, 2, 5, 10, 13, 26, 41, 65, 82, 130, 205, 410, 533, 1066, 2665, 4001, 5330, 8002, 20005, 40010, 52013, 104026, 164041, 260065, 328082, 520130, 820205, 1640410, 2132533, 4265066, 10662665, 21325330]

約数ペア:

[(1, 21325330), (2, 10662665), (5, 4265066), (10, 2132533), (13, 1640410), (26, 820205), (41, 520130), (65, 328082), (82, 260065), (130, 164041), (205, 104026), (410, 52013), (533, 40010), (1066, 20005), (2665, 8002), (4001, 5330)]