21327380

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{839}}^1$

素因数の和:920

約数の個数: 48

約数和(自身を含む): 47416320

約数和(自身を除く): 26088940

約数列:

[1, 2, 4, 5, 10, 20, 31, 41, 62, 82, 124, 155, 164, 205, 310, 410, 620, 820, 839, 1271, 1678, 2542, 3356, 4195, 5084, 6355, 8390, 12710, 16780, 25420, 26009, 34399, 52018, 68798, 104036, 130045, 137596, 171995, 260090, 343990, 520180, 687980, 1066369, 2132738, 4265476, 5331845, 10663690, 21327380]

約数ペア:

[(1, 21327380), (2, 10663690), (4, 5331845), (5, 4265476), (10, 2132738), (20, 1066369), (31, 687980), (41, 520180), (62, 343990), (82, 260090), (124, 171995), (155, 137596), (164, 130045), (205, 104036), (310, 68798), (410, 52018), (620, 34399), (820, 26009), (839, 25420), (1271, 16780), (1678, 12710), (2542, 8390), (3356, 6355), (4195, 5084)]