31831020

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{223}}^1$

素因数の和:312

約数の個数: 144

約数和(自身を含む): 106159872

約数和(自身を除く): 74328852

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 13, 15, 18, 20, 26, 30, 36, 39, 45, 52, 60, 61, 65, 78, 90, 117, 122, 130, 156, 180, 183, 195, 223, 234, 244, 260, 305, 366, 390, 446, 468, 549, 585, 610, 669, 732, 780, 793, 892, 915, 1098, 1115, 1170, 1220, 1338, 1586, 1830, 2007, 2196, 2230, 2340, 2379, 2676, 2745, 2899, 3172, 3345, 3660, 3965, 4014, 4460, 4758, 5490, 5798, 6690, 7137, 7930, 8028, 8697, 9516, 10035, 10980, 11596, 11895, 13380, 13603, 14274, 14495, 15860, 17394, 20070, 23790, 26091, 27206, 28548, 28990, 34788, 35685, 40140, 40809, 43485, 47580, 52182, 54412, 57980, 68015, 71370, 81618, 86970, 104364, 122427, 130455, 136030, 142740, 163236, 173940, 176839, 204045, 244854, 260910, 272060, 353678, 408090, 489708, 521820, 530517, 612135, 707356, 816180, 884195, 1061034, 1224270, 1591551, 1768390, 2122068, 2448540, 2652585, 3183102, 3536780, 5305170, 6366204, 7957755, 10610340, 15915510, 31831020]

約数ペア:

[(1, 31831020), (2, 15915510), (3, 10610340), (4, 7957755), (5, 6366204), (6, 5305170), (9, 3536780), (10, 3183102), (12, 2652585), (13, 2448540), (15, 2122068), (18, 1768390), (20, 1591551), (26, 1224270), (30, 1061034), (36, 884195), (39, 816180), (45, 707356), (52, 612135), (60, 530517), (61, 521820), (65, 489708), (78, 408090), (90, 353678), (117, 272060), (122, 260910), (130, 244854), (156, 204045), (180, 176839), (183, 173940), (195, 163236), (223, 142740), (234, 136030), (244, 130455), (260, 122427), (305, 104364), (366, 86970), (390, 81618), (446, 71370), (468, 68015), (549, 57980), (585, 54412), (610, 52182), (669, 47580), (732, 43485), (780, 40809), (793, 40140), (892, 35685), (915, 34788), (1098, 28990), (1115, 28548), (1170, 27206), (1220, 26091), (1338, 23790), (1586, 20070), (1830, 17394), (2007, 15860), (2196, 14495), (2230, 14274), (2340, 13603), (2379, 13380), (2676, 11895), (2745, 11596), (2899, 10980), (3172, 10035), (3345, 9516), (3660, 8697), (3965, 8028), (4014, 7930), (4460, 7137), (4758, 6690), (5490, 5798)]