201782020

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{199}}^1\times {\mathrm{419}}^1$

素因数の和:649

約数の個数: 72

約数和(自身を含む): 469224000

約数和(自身を除く): 267441980

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 121, 199, 220, 242, 398, 419, 484, 605, 796, 838, 995, 1210, 1676, 1990, 2095, 2189, 2420, 3980, 4190, 4378, 4609, 8380, 8756, 9218, 10945, 18436, 21890, 23045, 24079, 43780, 46090, 48158, 50699, 83381, 92180, 96316, 101398, 120395, 166762, 202796, 240790, 253495, 333524, 416905, 481580, 506990, 833810, 917191, 1013980, 1667620, 1834382, 3668764, 4585955, 9171910, 10089101, 18343820, 20178202, 40356404, 50445505, 100891010, 201782020]

約数ペア:

[(1, 201782020), (2, 100891010), (4, 50445505), (5, 40356404), (10, 20178202), (11, 18343820), (20, 10089101), (22, 9171910), (44, 4585955), (55, 3668764), (110, 1834382), (121, 1667620), (199, 1013980), (220, 917191), (242, 833810), (398, 506990), (419, 481580), (484, 416905), (605, 333524), (796, 253495), (838, 240790), (995, 202796), (1210, 166762), (1676, 120395), (1990, 101398), (2095, 96316), (2189, 92180), (2420, 83381), (3980, 50699), (4190, 48158), (4378, 46090), (4609, 43780), (8380, 24079), (8756, 23045), (9218, 21890), (10945, 18436)]