640117660

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^2\times {\mathrm{1217}}^1$

素因数の和:1280

約数の個数: 144

約数和(自身を含む): 1758947904

約数和(自身を除く): 1118830244

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 17, 20, 26, 28, 34, 35, 52, 65, 68, 70, 85, 91, 119, 130, 140, 170, 182, 221, 238, 260, 289, 340, 364, 442, 455, 476, 578, 595, 884, 910, 1105, 1156, 1190, 1217, 1445, 1547, 1820, 2023, 2210, 2380, 2434, 2890, 3094, 3757, 4046, 4420, 4868, 5780, 6085, 6188, 7514, 7735, 8092, 8519, 10115, 12170, 15028, 15470, 15821, 17038, 18785, 20230, 20689, 24340, 26299, 30940, 31642, 34076, 37570, 40460, 41378, 42595, 52598, 63284, 75140, 79105, 82756, 85190, 103445, 105196, 110747, 131495, 144823, 158210, 170380, 206890, 221494, 262990, 268957, 289646, 316420, 351713, 413780, 442988, 525980, 537914, 553735, 579292, 703426, 724115, 1075828, 1107470, 1344785, 1406852, 1448230, 1758565, 1882699, 2214940, 2461991, 2689570, 2896460, 3517130, 3765398, 4572269, 4923982, 5379140, 7034260, 7530796, 9144538, 9413495, 9847964, 12309955, 18289076, 18826990, 22861345, 24619910, 32005883, 37653980, 45722690, 49239820, 64011766, 91445380, 128023532, 160029415, 320058830, 640117660]

約数ペア:

[(1, 640117660), (2, 320058830), (4, 160029415), (5, 128023532), (7, 91445380), (10, 64011766), (13, 49239820), (14, 45722690), (17, 37653980), (20, 32005883), (26, 24619910), (28, 22861345), (34, 18826990), (35, 18289076), (52, 12309955), (65, 9847964), (68, 9413495), (70, 9144538), (85, 7530796), (91, 7034260), (119, 5379140), (130, 4923982), (140, 4572269), (170, 3765398), (182, 3517130), (221, 2896460), (238, 2689570), (260, 2461991), (289, 2214940), (340, 1882699), (364, 1758565), (442, 1448230), (455, 1406852), (476, 1344785), (578, 1107470), (595, 1075828), (884, 724115), (910, 703426), (1105, 579292), (1156, 553735), (1190, 537914), (1217, 525980), (1445, 442988), (1547, 413780), (1820, 351713), (2023, 316420), (2210, 289646), (2380, 268957), (2434, 262990), (2890, 221494), (3094, 206890), (3757, 170380), (4046, 158210), (4420, 144823), (4868, 131495), (5780, 110747), (6085, 105196), (6188, 103445), (7514, 85190), (7735, 82756), (8092, 79105), (8519, 75140), (10115, 63284), (12170, 52598), (15028, 42595), (15470, 41378), (15821, 40460), (17038, 37570), (18785, 34076), (20230, 31642), (20689, 30940), (24340, 26299)]