21069460

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{1999}}^1$

素因数の和:2056

約数の個数: 48

約数和(自身を含む): 48384000

約数和(自身を除く): 27314540

約数列:

[1, 2, 4, 5, 10, 17, 20, 31, 34, 62, 68, 85, 124, 155, 170, 310, 340, 527, 620, 1054, 1999, 2108, 2635, 3998, 5270, 7996, 9995, 10540, 19990, 33983, 39980, 61969, 67966, 123938, 135932, 169915, 247876, 309845, 339830, 619690, 679660, 1053473, 1239380, 2106946, 4213892, 5267365, 10534730, 21069460]

約数ペア:

[(1, 21069460), (2, 10534730), (4, 5267365), (5, 4213892), (10, 2106946), (17, 1239380), (20, 1053473), (31, 679660), (34, 619690), (62, 339830), (68, 309845), (85, 247876), (124, 169915), (155, 135932), (170, 123938), (310, 67966), (340, 61969), (527, 39980), (620, 33983), (1054, 19990), (1999, 10540), (2108, 9995), (2635, 7996), (3998, 5270)]