81717240

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{1997}}^1$

素因数の和:2053

約数の個数: 128

約数和(自身を含む): 276203520

約数和(自身を除く): 194486280

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 11, 12, 15, 20, 22, 24, 30, 31, 33, 40, 44, 55, 60, 62, 66, 88, 93, 110, 120, 124, 132, 155, 165, 186, 220, 248, 264, 310, 330, 341, 372, 440, 465, 620, 660, 682, 744, 930, 1023, 1240, 1320, 1364, 1705, 1860, 1997, 2046, 2728, 3410, 3720, 3994, 4092, 5115, 5991, 6820, 7988, 8184, 9985, 10230, 11982, 13640, 15976, 19970, 20460, 21967, 23964, 29955, 39940, 40920, 43934, 47928, 59910, 61907, 65901, 79880, 87868, 109835, 119820, 123814, 131802, 175736, 185721, 219670, 239640, 247628, 263604, 309535, 329505, 371442, 439340, 495256, 527208, 619070, 659010, 680977, 742884, 878680, 928605, 1238140, 1318020, 1361954, 1485768, 1857210, 2042931, 2476280, 2636040, 2723908, 3404885, 3714420, 4085862, 5447816, 6809770, 7428840, 8171724, 10214655, 13619540, 16343448, 20429310, 27239080, 40858620, 81717240]

約数ペア:

[(1, 81717240), (2, 40858620), (3, 27239080), (4, 20429310), (5, 16343448), (6, 13619540), (8, 10214655), (10, 8171724), (11, 7428840), (12, 6809770), (15, 5447816), (20, 4085862), (22, 3714420), (24, 3404885), (30, 2723908), (31, 2636040), (33, 2476280), (40, 2042931), (44, 1857210), (55, 1485768), (60, 1361954), (62, 1318020), (66, 1238140), (88, 928605), (93, 878680), (110, 742884), (120, 680977), (124, 659010), (132, 619070), (155, 527208), (165, 495256), (186, 439340), (220, 371442), (248, 329505), (264, 309535), (310, 263604), (330, 247628), (341, 239640), (372, 219670), (440, 185721), (465, 175736), (620, 131802), (660, 123814), (682, 119820), (744, 109835), (930, 87868), (1023, 79880), (1240, 65901), (1320, 61907), (1364, 59910), (1705, 47928), (1860, 43934), (1997, 40920), (2046, 39940), (2728, 29955), (3410, 23964), (3720, 21967), (3994, 20460), (4092, 19970), (5115, 15976), (5991, 13640), (6820, 11982), (7988, 10230), (8184, 9985)]