20878840

素因数分解:

$2^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{41}}^1\times {\mathrm{439}}^1$

素因数の和:520

約数の個数: 64

約数和(自身を含む): 49896000

約数和(自身を除く): 29017160

約数列:

[1, 2, 4, 5, 8, 10, 20, 29, 40, 41, 58, 82, 116, 145, 164, 205, 232, 290, 328, 410, 439, 580, 820, 878, 1160, 1189, 1640, 1756, 2195, 2378, 3512, 4390, 4756, 5945, 8780, 9512, 11890, 12731, 17560, 17999, 23780, 25462, 35998, 47560, 50924, 63655, 71996, 89995, 101848, 127310, 143992, 179990, 254620, 359980, 509240, 521971, 719960, 1043942, 2087884, 2609855, 4175768, 5219710, 10439420, 20878840]

約数ペア:

[(1, 20878840), (2, 10439420), (4, 5219710), (5, 4175768), (8, 2609855), (10, 2087884), (20, 1043942), (29, 719960), (40, 521971), (41, 509240), (58, 359980), (82, 254620), (116, 179990), (145, 143992), (164, 127310), (205, 101848), (232, 89995), (290, 71996), (328, 63655), (410, 50924), (439, 47560), (580, 35998), (820, 25462), (878, 23780), (1160, 17999), (1189, 17560), (1640, 12731), (1756, 11890), (2195, 9512), (2378, 8780), (3512, 5945), (4390, 4756)]