21452807920

素因数分解:

$2^4\times 5^1\times {\mathrm{277}}^1\times {\mathrm{971}}^1\times {\mathrm{997}}^1$

素因数の和:2258

約数の個数: 80

約数和(自身を含む): 50159655648

約数和(自身を除く): 28706847728

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 277, 554, 971, 997, 1108, 1385, 1942, 1994, 2216, 2770, 3884, 3988, 4432, 4855, 4985, 5540, 7768, 7976, 9710, 9970, 11080, 15536, 15952, 19420, 19940, 22160, 38840, 39880, 77680, 79760, 268967, 276169, 537934, 552338, 968087, 1075868, 1104676, 1344835, 1380845, 1936174, 2151736, 2209352, 2689670, 2761690, 3872348, 4303472, 4418704, 4840435, 5379340, 5523380, 7744696, 9680870, 10758680, 11046760, 15489392, 19361740, 21517360, 22093520, 38723480, 77446960, 268160099, 536320198, 1072640396, 1340800495, 2145280792, 2681600990, 4290561584, 5363201980, 10726403960, 21452807920]

約数ペア:

[(1, 21452807920), (2, 10726403960), (4, 5363201980), (5, 4290561584), (8, 2681600990), (10, 2145280792), (16, 1340800495), (20, 1072640396), (40, 536320198), (80, 268160099), (277, 77446960), (554, 38723480), (971, 22093520), (997, 21517360), (1108, 19361740), (1385, 15489392), (1942, 11046760), (1994, 10758680), (2216, 9680870), (2770, 7744696), (3884, 5523380), (3988, 5379340), (4432, 4840435), (4855, 4418704), (4985, 4303472), (5540, 3872348), (7768, 2761690), (7976, 2689670), (9710, 2209352), (9970, 2151736), (11080, 1936174), (15536, 1380845), (15952, 1344835), (19420, 1104676), (19940, 1075868), (22160, 968087), (38840, 552338), (39880, 537934), (77680, 276169), (79760, 268967)]