20507080

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^2\times {\mathrm{19}}^1\times {\mathrm{223}}^1$

素因数の和:275

約数の個数: 96

約数和(自身を含む): 53625600

約数和(自身を除く): 33118520

約数列:

[1, 2, 4, 5, 8, 10, 11, 19, 20, 22, 38, 40, 44, 55, 76, 88, 95, 110, 121, 152, 190, 209, 220, 223, 242, 380, 418, 440, 446, 484, 605, 760, 836, 892, 968, 1045, 1115, 1210, 1672, 1784, 2090, 2230, 2299, 2420, 2453, 4180, 4237, 4460, 4598, 4840, 4906, 8360, 8474, 8920, 9196, 9812, 11495, 12265, 16948, 18392, 19624, 21185, 22990, 24530, 26983, 33896, 42370, 45980, 46607, 49060, 53966, 84740, 91960, 93214, 98120, 107932, 134915, 169480, 186428, 215864, 233035, 269830, 372856, 466070, 512677, 539660, 932140, 1025354, 1079320, 1864280, 2050708, 2563385, 4101416, 5126770, 10253540, 20507080]

約数ペア:

[(1, 20507080), (2, 10253540), (4, 5126770), (5, 4101416), (8, 2563385), (10, 2050708), (11, 1864280), (19, 1079320), (20, 1025354), (22, 932140), (38, 539660), (40, 512677), (44, 466070), (55, 372856), (76, 269830), (88, 233035), (95, 215864), (110, 186428), (121, 169480), (152, 134915), (190, 107932), (209, 98120), (220, 93214), (223, 91960), (242, 84740), (380, 53966), (418, 49060), (440, 46607), (446, 45980), (484, 42370), (605, 33896), (760, 26983), (836, 24530), (892, 22990), (968, 21185), (1045, 19624), (1115, 18392), (1210, 16948), (1672, 12265), (1784, 11495), (2090, 9812), (2230, 9196), (2299, 8920), (2420, 8474), (2453, 8360), (4180, 4906), (4237, 4840), (4460, 4598)]