20515920

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{73}}^1\times {\mathrm{1171}}^1$

素因数の和:1260

約数の個数: 80

約数和(自身を含む): 64525632

約数和(自身を除く): 44009712

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 73, 80, 120, 146, 219, 240, 292, 365, 438, 584, 730, 876, 1095, 1168, 1171, 1460, 1752, 2190, 2342, 2920, 3504, 3513, 4380, 4684, 5840, 5855, 7026, 8760, 9368, 11710, 14052, 17520, 17565, 18736, 23420, 28104, 35130, 46840, 56208, 70260, 85483, 93680, 140520, 170966, 256449, 281040, 341932, 427415, 512898, 683864, 854830, 1025796, 1282245, 1367728, 1709660, 2051592, 2564490, 3419320, 4103184, 5128980, 6838640, 10257960, 20515920]

約数ペア:

[(1, 20515920), (2, 10257960), (3, 6838640), (4, 5128980), (5, 4103184), (6, 3419320), (8, 2564490), (10, 2051592), (12, 1709660), (15, 1367728), (16, 1282245), (20, 1025796), (24, 854830), (30, 683864), (40, 512898), (48, 427415), (60, 341932), (73, 281040), (80, 256449), (120, 170966), (146, 140520), (219, 93680), (240, 85483), (292, 70260), (365, 56208), (438, 46840), (584, 35130), (730, 28104), (876, 23420), (1095, 18736), (1168, 17565), (1171, 17520), (1460, 14052), (1752, 11710), (2190, 9368), (2342, 8760), (2920, 7026), (3504, 5855), (3513, 5840), (4380, 4684)]