81203880

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{83}}^1\times {\mathrm{263}}^1$

素因数の和:391

約数の個数: 128

約数和(自身を含む): 255467520

約数和(自身を除く): 174263640

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 31, 40, 60, 62, 83, 93, 120, 124, 155, 166, 186, 248, 249, 263, 310, 332, 372, 415, 465, 498, 526, 620, 664, 744, 789, 830, 930, 996, 1052, 1240, 1245, 1315, 1578, 1660, 1860, 1992, 2104, 2490, 2573, 2630, 3156, 3320, 3720, 3945, 4980, 5146, 5260, 6312, 7719, 7890, 8153, 9960, 10292, 10520, 12865, 15438, 15780, 16306, 20584, 21829, 24459, 25730, 30876, 31560, 32612, 38595, 40765, 43658, 48918, 51460, 61752, 65224, 65487, 77190, 81530, 87316, 97836, 102920, 109145, 122295, 130974, 154380, 163060, 174632, 195672, 218290, 244590, 261948, 308760, 326120, 327435, 436580, 489180, 523896, 654870, 676699, 873160, 978360, 1309740, 1353398, 2030097, 2619480, 2706796, 3383495, 4060194, 5413592, 6766990, 8120388, 10150485, 13533980, 16240776, 20300970, 27067960, 40601940, 81203880]

約数ペア:

[(1, 81203880), (2, 40601940), (3, 27067960), (4, 20300970), (5, 16240776), (6, 13533980), (8, 10150485), (10, 8120388), (12, 6766990), (15, 5413592), (20, 4060194), (24, 3383495), (30, 2706796), (31, 2619480), (40, 2030097), (60, 1353398), (62, 1309740), (83, 978360), (93, 873160), (120, 676699), (124, 654870), (155, 523896), (166, 489180), (186, 436580), (248, 327435), (249, 326120), (263, 308760), (310, 261948), (332, 244590), (372, 218290), (415, 195672), (465, 174632), (498, 163060), (526, 154380), (620, 130974), (664, 122295), (744, 109145), (789, 102920), (830, 97836), (930, 87316), (996, 81530), (1052, 77190), (1240, 65487), (1245, 65224), (1315, 61752), (1578, 51460), (1660, 48918), (1860, 43658), (1992, 40765), (2104, 38595), (2490, 32612), (2573, 31560), (2630, 30876), (3156, 25730), (3320, 24459), (3720, 21829), (3945, 20584), (4980, 16306), (5146, 15780), (5260, 15438), (6312, 12865), (7719, 10520), (7890, 10292), (8153, 9960)]