645448180

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{17}}^1\times {\mathrm{47}}^1\times {\mathrm{239}}^1$

素因数の和:338

約数の個数: 144

約数和(自身を含む): 1593768960

約数和(自身を除く): 948320780

約数列:

[1, 2, 4, 5, 10, 13, 17, 20, 26, 34, 47, 52, 65, 68, 85, 94, 130, 169, 170, 188, 221, 235, 239, 260, 338, 340, 442, 470, 478, 611, 676, 799, 845, 884, 940, 956, 1105, 1195, 1222, 1598, 1690, 2210, 2390, 2444, 2873, 3055, 3107, 3196, 3380, 3995, 4063, 4420, 4780, 5746, 6110, 6214, 7943, 7990, 8126, 10387, 11233, 11492, 12220, 12428, 14365, 15535, 15886, 15980, 16252, 20315, 20774, 22466, 28730, 31070, 31772, 39715, 40391, 40630, 41548, 44932, 51935, 52819, 56165, 57460, 62140, 79430, 80782, 81260, 103870, 105638, 112330, 135031, 146029, 158860, 161564, 190961, 201955, 207740, 211276, 224660, 264095, 270062, 292058, 381922, 403910, 528190, 540124, 584116, 675155, 686647, 730145, 763844, 807820, 954805, 1056380, 1350310, 1373294, 1460290, 1898377, 1909610, 2482493, 2700620, 2746588, 2920580, 3433235, 3796754, 3819220, 4964986, 6866470, 7593508, 9491885, 9929972, 12412465, 13732940, 18983770, 24824930, 32272409, 37967540, 49649860, 64544818, 129089636, 161362045, 322724090, 645448180]

約数ペア:

[(1, 645448180), (2, 322724090), (4, 161362045), (5, 129089636), (10, 64544818), (13, 49649860), (17, 37967540), (20, 32272409), (26, 24824930), (34, 18983770), (47, 13732940), (52, 12412465), (65, 9929972), (68, 9491885), (85, 7593508), (94, 6866470), (130, 4964986), (169, 3819220), (170, 3796754), (188, 3433235), (221, 2920580), (235, 2746588), (239, 2700620), (260, 2482493), (338, 1909610), (340, 1898377), (442, 1460290), (470, 1373294), (478, 1350310), (611, 1056380), (676, 954805), (799, 807820), (845, 763844), (884, 730145), (940, 686647), (956, 675155), (1105, 584116), (1195, 540124), (1222, 528190), (1598, 403910), (1690, 381922), (2210, 292058), (2390, 270062), (2444, 264095), (2873, 224660), (3055, 211276), (3107, 207740), (3196, 201955), (3380, 190961), (3995, 161564), (4063, 158860), (4420, 146029), (4780, 135031), (5746, 112330), (6110, 105638), (6214, 103870), (7943, 81260), (7990, 80782), (8126, 79430), (10387, 62140), (11233, 57460), (11492, 56165), (12220, 52819), (12428, 51935), (14365, 44932), (15535, 41548), (15886, 40630), (15980, 40391), (16252, 39715), (20315, 31772), (20774, 31070), (22466, 28730)]