78921440

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{1997}}^1$

素因数の和:2044

約数の個数: 96

約数和(自身を含む): 211468320

約数和(自身を除く): 132546880

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 19, 20, 26, 32, 38, 40, 52, 65, 76, 80, 95, 104, 130, 152, 160, 190, 208, 247, 260, 304, 380, 416, 494, 520, 608, 760, 988, 1040, 1235, 1520, 1976, 1997, 2080, 2470, 3040, 3952, 3994, 4940, 7904, 7988, 9880, 9985, 15976, 19760, 19970, 25961, 31952, 37943, 39520, 39940, 51922, 63904, 75886, 79880, 103844, 129805, 151772, 159760, 189715, 207688, 259610, 303544, 319520, 379430, 415376, 493259, 519220, 607088, 758860, 830752, 986518, 1038440, 1214176, 1517720, 1973036, 2076880, 2466295, 3035440, 3946072, 4153760, 4932590, 6070880, 7892144, 9865180, 15784288, 19730360, 39460720, 78921440]

約数ペア:

[(1, 78921440), (2, 39460720), (4, 19730360), (5, 15784288), (8, 9865180), (10, 7892144), (13, 6070880), (16, 4932590), (19, 4153760), (20, 3946072), (26, 3035440), (32, 2466295), (38, 2076880), (40, 1973036), (52, 1517720), (65, 1214176), (76, 1038440), (80, 986518), (95, 830752), (104, 758860), (130, 607088), (152, 519220), (160, 493259), (190, 415376), (208, 379430), (247, 319520), (260, 303544), (304, 259610), (380, 207688), (416, 189715), (494, 159760), (520, 151772), (608, 129805), (760, 103844), (988, 79880), (1040, 75886), (1235, 63904), (1520, 51922), (1976, 39940), (1997, 39520), (2080, 37943), (2470, 31952), (3040, 25961), (3952, 19970), (3994, 19760), (4940, 15976), (7904, 9985), (7988, 9880)]