640426920

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{40127}}^1$

素因数の和:40167

約数の個数: 128

約数和(自身を含む): 2311372800

約数和(自身を除く): 1670945880

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 19, 20, 21, 24, 28, 30, 35, 38, 40, 42, 56, 57, 60, 70, 76, 84, 95, 105, 114, 120, 133, 140, 152, 168, 190, 210, 228, 266, 280, 285, 380, 399, 420, 456, 532, 570, 665, 760, 798, 840, 1064, 1140, 1330, 1596, 1995, 2280, 2660, 3192, 3990, 5320, 7980, 15960, 40127, 80254, 120381, 160508, 200635, 240762, 280889, 321016, 401270, 481524, 561778, 601905, 762413, 802540, 842667, 963048, 1123556, 1203810, 1404445, 1524826, 1605080, 1685334, 2247112, 2287239, 2407620, 2808890, 3049652, 3370668, 3812065, 4213335, 4574478, 4815240, 5336891, 5617780, 6099304, 6741336, 7624130, 8426670, 9148956, 10673782, 11235560, 11436195, 15248260, 16010673, 16853340, 18297912, 21347564, 22872390, 26684455, 30496520, 32021346, 33706680, 42695128, 45744780, 53368910, 64042692, 80053365, 91489560, 106737820, 128085384, 160106730, 213475640, 320213460, 640426920]

約数ペア:

[(1, 640426920), (2, 320213460), (3, 213475640), (4, 160106730), (5, 128085384), (6, 106737820), (7, 91489560), (8, 80053365), (10, 64042692), (12, 53368910), (14, 45744780), (15, 42695128), (19, 33706680), (20, 32021346), (21, 30496520), (24, 26684455), (28, 22872390), (30, 21347564), (35, 18297912), (38, 16853340), (40, 16010673), (42, 15248260), (56, 11436195), (57, 11235560), (60, 10673782), (70, 9148956), (76, 8426670), (84, 7624130), (95, 6741336), (105, 6099304), (114, 5617780), (120, 5336891), (133, 4815240), (140, 4574478), (152, 4213335), (168, 3812065), (190, 3370668), (210, 3049652), (228, 2808890), (266, 2407620), (280, 2287239), (285, 2247112), (380, 1685334), (399, 1605080), (420, 1524826), (456, 1404445), (532, 1203810), (570, 1123556), (665, 963048), (760, 842667), (798, 802540), (840, 762413), (1064, 601905), (1140, 561778), (1330, 481524), (1596, 401270), (1995, 321016), (2280, 280889), (2660, 240762), (3192, 200635), (3990, 160508), (5320, 120381), (7980, 80254), (15960, 40127)]