19915020

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{83}}^1$

素因数の和:172

約数の個数: 144

約数和(自身を含む): 64576512

約数和(自身を除く): 44661492

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 31, 36, 43, 45, 60, 62, 83, 86, 90, 93, 124, 129, 155, 166, 172, 180, 186, 215, 249, 258, 279, 310, 332, 372, 387, 415, 430, 465, 498, 516, 558, 620, 645, 747, 774, 830, 860, 930, 996, 1116, 1245, 1290, 1333, 1395, 1494, 1548, 1660, 1860, 1935, 2490, 2573, 2580, 2666, 2790, 2988, 3569, 3735, 3870, 3999, 4980, 5146, 5332, 5580, 6665, 7138, 7470, 7719, 7740, 7998, 10292, 10707, 11997, 12865, 13330, 14276, 14940, 15438, 15996, 17845, 19995, 21414, 23157, 23994, 25730, 26660, 30876, 32121, 35690, 38595, 39990, 42828, 46314, 47988, 51460, 53535, 59985, 64242, 71380, 77190, 79980, 92628, 107070, 110639, 115785, 119970, 128484, 154380, 160605, 214140, 221278, 231570, 239940, 321210, 331917, 442556, 463140, 553195, 642420, 663834, 995751, 1106390, 1327668, 1659585, 1991502, 2212780, 3319170, 3983004, 4978755, 6638340, 9957510, 19915020]

約数ペア:

[(1, 19915020), (2, 9957510), (3, 6638340), (4, 4978755), (5, 3983004), (6, 3319170), (9, 2212780), (10, 1991502), (12, 1659585), (15, 1327668), (18, 1106390), (20, 995751), (30, 663834), (31, 642420), (36, 553195), (43, 463140), (45, 442556), (60, 331917), (62, 321210), (83, 239940), (86, 231570), (90, 221278), (93, 214140), (124, 160605), (129, 154380), (155, 128484), (166, 119970), (172, 115785), (180, 110639), (186, 107070), (215, 92628), (249, 79980), (258, 77190), (279, 71380), (310, 64242), (332, 59985), (372, 53535), (387, 51460), (415, 47988), (430, 46314), (465, 42828), (498, 39990), (516, 38595), (558, 35690), (620, 32121), (645, 30876), (747, 26660), (774, 25730), (830, 23994), (860, 23157), (930, 21414), (996, 19995), (1116, 17845), (1245, 15996), (1290, 15438), (1333, 14940), (1395, 14276), (1494, 13330), (1548, 12865), (1660, 11997), (1860, 10707), (1935, 10292), (2490, 7998), (2573, 7740), (2580, 7719), (2666, 7470), (2790, 7138), (2988, 6665), (3569, 5580), (3735, 5332), (3870, 5146), (3999, 4980)]