20959760

素因数分解:

$2^4\times 5^1\times {\mathrm{37}}^1\times {\mathrm{73}}^1\times {\mathrm{97}}^1$

素因数の和:220

約数の個数: 80

約数和(自身を含む): 51257136

約数和(自身を除く): 30297376

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 37, 40, 73, 74, 80, 97, 146, 148, 185, 194, 292, 296, 365, 370, 388, 485, 584, 592, 730, 740, 776, 970, 1168, 1460, 1480, 1552, 1940, 2701, 2920, 2960, 3589, 3880, 5402, 5840, 7081, 7178, 7760, 10804, 13505, 14162, 14356, 17945, 21608, 27010, 28324, 28712, 35405, 35890, 43216, 54020, 56648, 57424, 70810, 71780, 108040, 113296, 141620, 143560, 216080, 261997, 283240, 287120, 523994, 566480, 1047988, 1309985, 2095976, 2619970, 4191952, 5239940, 10479880, 20959760]

約数ペア:

[(1, 20959760), (2, 10479880), (4, 5239940), (5, 4191952), (8, 2619970), (10, 2095976), (16, 1309985), (20, 1047988), (37, 566480), (40, 523994), (73, 287120), (74, 283240), (80, 261997), (97, 216080), (146, 143560), (148, 141620), (185, 113296), (194, 108040), (292, 71780), (296, 70810), (365, 57424), (370, 56648), (388, 54020), (485, 43216), (584, 35890), (592, 35405), (730, 28712), (740, 28324), (776, 27010), (970, 21608), (1168, 17945), (1460, 14356), (1480, 14162), (1552, 13505), (1940, 10804), (2701, 7760), (2920, 7178), (2960, 7081), (3589, 5840), (3880, 5402)]