19887220

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{16301}}^1$

素因数の和:16371

約数の個数: 24

約数和(自身を含む): 42450408

約数和(自身を除く): 22563188

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 244, 305, 610, 1220, 16301, 32602, 65204, 81505, 163010, 326020, 994361, 1988722, 3977444, 4971805, 9943610, 19887220]

約数ペア:

[(1, 19887220), (2, 9943610), (4, 4971805), (5, 3977444), (10, 1988722), (20, 994361), (61, 326020), (122, 163010), (244, 81505), (305, 65204), (610, 32602), (1220, 16301)]