640064

素因数分解:

$2^6\times {\mathrm{73}}^1\times {\mathrm{137}}^1$

素因数の和:222

約数の個数: 28

約数和(自身を含む): 1296924

約数和(自身を除く): 656860

約数列:

[1, 2, 4, 8, 16, 32, 64, 73, 137, 146, 274, 292, 548, 584, 1096, 1168, 2192, 2336, 4384, 4672, 8768, 10001, 20002, 40004, 80008, 160016, 320032, 640064]

約数ペア:

[(1, 640064), (2, 320032), (4, 160016), (8, 80008), (16, 40004), (32, 20002), (64, 10001), (73, 8768), (137, 4672), (146, 4384), (274, 2336), (292, 2192), (548, 1168), (584, 1096)]