20913960

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{397}}^1\times {\mathrm{439}}^1$

素因数の和:850

約数の個数: 64

約数和(自身を含む): 63043200

約数和(自身を除く): 42129240

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120, 397, 439, 794, 878, 1191, 1317, 1588, 1756, 1985, 2195, 2382, 2634, 3176, 3512, 3970, 4390, 4764, 5268, 5955, 6585, 7940, 8780, 9528, 10536, 11910, 13170, 15880, 17560, 23820, 26340, 47640, 52680, 174283, 348566, 522849, 697132, 871415, 1045698, 1394264, 1742830, 2091396, 2614245, 3485660, 4182792, 5228490, 6971320, 10456980, 20913960]

約数ペア:

[(1, 20913960), (2, 10456980), (3, 6971320), (4, 5228490), (5, 4182792), (6, 3485660), (8, 2614245), (10, 2091396), (12, 1742830), (15, 1394264), (20, 1045698), (24, 871415), (30, 697132), (40, 522849), (60, 348566), (120, 174283), (397, 52680), (439, 47640), (794, 26340), (878, 23820), (1191, 17560), (1317, 15880), (1588, 13170), (1756, 11910), (1985, 10536), (2195, 9528), (2382, 8780), (2634, 7940), (3176, 6585), (3512, 5955), (3970, 5268), (4390, 4764)]