21365860

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{83}}^1\times {\mathrm{211}}^1$

素因数の和:364

約数の個数: 48

約数和(自身を含む): 46372032

約数和(自身を除く): 25006172

約数列:

[1, 2, 4, 5, 10, 20, 61, 83, 122, 166, 211, 244, 305, 332, 415, 422, 610, 830, 844, 1055, 1220, 1660, 2110, 4220, 5063, 10126, 12871, 17513, 20252, 25315, 25742, 35026, 50630, 51484, 64355, 70052, 87565, 101260, 128710, 175130, 257420, 350260, 1068293, 2136586, 4273172, 5341465, 10682930, 21365860]

約数ペア:

[(1, 21365860), (2, 10682930), (4, 5341465), (5, 4273172), (10, 2136586), (20, 1068293), (61, 350260), (83, 257420), (122, 175130), (166, 128710), (211, 101260), (244, 87565), (305, 70052), (332, 64355), (415, 51484), (422, 50630), (610, 35026), (830, 25742), (844, 25315), (1055, 20252), (1220, 17513), (1660, 12871), (2110, 10126), (4220, 5063)]