20859560

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{83}}^1\times {\mathrm{103}}^1$

素因数の和:258

約数の個数: 64

約数和(自身を含む): 48746880

約数和(自身を除く): 27887320

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 83, 103, 122, 166, 206, 244, 305, 332, 412, 415, 488, 515, 610, 664, 824, 830, 1030, 1220, 1660, 2060, 2440, 3320, 4120, 5063, 6283, 8549, 10126, 12566, 17098, 20252, 25132, 25315, 31415, 34196, 40504, 42745, 50264, 50630, 62830, 68392, 85490, 101260, 125660, 170980, 202520, 251320, 341960, 521489, 1042978, 2085956, 2607445, 4171912, 5214890, 10429780, 20859560]

約数ペア:

[(1, 20859560), (2, 10429780), (4, 5214890), (5, 4171912), (8, 2607445), (10, 2085956), (20, 1042978), (40, 521489), (61, 341960), (83, 251320), (103, 202520), (122, 170980), (166, 125660), (206, 101260), (244, 85490), (305, 68392), (332, 62830), (412, 50630), (415, 50264), (488, 42745), (515, 40504), (610, 34196), (664, 31415), (824, 25315), (830, 25132), (1030, 20252), (1220, 17098), (1660, 12566), (2060, 10126), (2440, 8549), (3320, 6283), (4120, 5063)]