20383760

素因数分解:

$2^4\times 5^1\times {\mathrm{61}}^1\times {\mathrm{4177}}^1$

素因数の和:4251

約数の個数: 40

約数和(自身を含む): 48180696

約数和(自身を除く): 27796936

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 61, 80, 122, 244, 305, 488, 610, 976, 1220, 2440, 4177, 4880, 8354, 16708, 20885, 33416, 41770, 66832, 83540, 167080, 254797, 334160, 509594, 1019188, 1273985, 2038376, 2547970, 4076752, 5095940, 10191880, 20383760]

約数ペア:

[(1, 20383760), (2, 10191880), (4, 5095940), (5, 4076752), (8, 2547970), (10, 2038376), (16, 1273985), (20, 1019188), (40, 509594), (61, 334160), (80, 254797), (122, 167080), (244, 83540), (305, 66832), (488, 41770), (610, 33416), (976, 20885), (1220, 16708), (2440, 8354), (4177, 4880)]