205062520

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{12721}}^1$

素因数の和:12776

約数の個数: 64

約数和(自身を含む): 512951040

約数和(自身を除く): 307888520

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 31, 40, 52, 62, 65, 104, 124, 130, 155, 248, 260, 310, 403, 520, 620, 806, 1240, 1612, 2015, 3224, 4030, 8060, 12721, 16120, 25442, 50884, 63605, 101768, 127210, 165373, 254420, 330746, 394351, 508840, 661492, 788702, 826865, 1322984, 1577404, 1653730, 1971755, 3154808, 3307460, 3943510, 5126563, 6614920, 7887020, 10253126, 15774040, 20506252, 25632815, 41012504, 51265630, 102531260, 205062520]

約数ペア:

[(1, 205062520), (2, 102531260), (4, 51265630), (5, 41012504), (8, 25632815), (10, 20506252), (13, 15774040), (20, 10253126), (26, 7887020), (31, 6614920), (40, 5126563), (52, 3943510), (62, 3307460), (65, 3154808), (104, 1971755), (124, 1653730), (130, 1577404), (155, 1322984), (248, 826865), (260, 788702), (310, 661492), (403, 508840), (520, 394351), (620, 330746), (806, 254420), (1240, 165373), (1612, 127210), (2015, 101768), (3224, 63605), (4030, 50884), (8060, 25442), (12721, 16120)]