640675984

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{563}}^1\times {\mathrm{5471}}^1$

素因数の和:6055

約数の個数: 40

約数和(自身を含む): 1339414272

約数和(自身を除く): 698738288

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 563, 1126, 2252, 4504, 5471, 7319, 9008, 10942, 14638, 21884, 29276, 43768, 58552, 71123, 87536, 117104, 142246, 284492, 568984, 1137968, 3080173, 6160346, 12320692, 24641384, 40042249, 49282768, 80084498, 160168996, 320337992, 640675984]

約数ペア:

[(1, 640675984), (2, 320337992), (4, 160168996), (8, 80084498), (13, 49282768), (16, 40042249), (26, 24641384), (52, 12320692), (104, 6160346), (208, 3080173), (563, 1137968), (1126, 568984), (2252, 284492), (4504, 142246), (5471, 117104), (7319, 87536), (9008, 71123), (10942, 58552), (14638, 43768), (21884, 29276)]