664498940

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{66851}}^1$

素因数の和:66938

約数の個数: 48

約数和(自身を含む): 1617283584

約数和(自身を除く): 952784644

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 71, 140, 142, 284, 355, 497, 710, 994, 1420, 1988, 2485, 4970, 9940, 66851, 133702, 267404, 334255, 467957, 668510, 935914, 1337020, 1871828, 2339785, 4679570, 4746421, 9359140, 9492842, 18985684, 23732105, 33224947, 47464210, 66449894, 94928420, 132899788, 166124735, 332249470, 664498940]

約数ペア:

[(1, 664498940), (2, 332249470), (4, 166124735), (5, 132899788), (7, 94928420), (10, 66449894), (14, 47464210), (20, 33224947), (28, 23732105), (35, 18985684), (70, 9492842), (71, 9359140), (140, 4746421), (142, 4679570), (284, 2339785), (355, 1871828), (497, 1337020), (710, 935914), (994, 668510), (1420, 467957), (1988, 334255), (2485, 267404), (4970, 133702), (9940, 66851)]