15909640

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{89}}^1\times {\mathrm{109}}^1$

素因数の和:250

約数の個数: 64

約数和(自身を含む): 37422000

約数和(自身を除く): 21512360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 89, 109, 164, 178, 205, 218, 328, 356, 410, 436, 445, 545, 712, 820, 872, 890, 1090, 1640, 1780, 2180, 3560, 3649, 4360, 4469, 7298, 8938, 9701, 14596, 17876, 18245, 19402, 22345, 29192, 35752, 36490, 38804, 44690, 48505, 72980, 77608, 89380, 97010, 145960, 178760, 194020, 388040, 397741, 795482, 1590964, 1988705, 3181928, 3977410, 7954820, 15909640]

約数ペア:

[(1, 15909640), (2, 7954820), (4, 3977410), (5, 3181928), (8, 1988705), (10, 1590964), (20, 795482), (40, 397741), (41, 388040), (82, 194020), (89, 178760), (109, 145960), (164, 97010), (178, 89380), (205, 77608), (218, 72980), (328, 48505), (356, 44690), (410, 38804), (436, 36490), (445, 35752), (545, 29192), (712, 22345), (820, 19402), (872, 18245), (890, 17876), (1090, 14596), (1640, 9701), (1780, 8938), (2180, 7298), (3560, 4469), (3649, 4360)]