261615720

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{257}}^1\times {\mathrm{499}}^1$

素因数の和:787

約数の個数: 128

約数和(自身を含む): 835920000

約数和(自身を除く): 574304280

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 17, 20, 24, 30, 34, 40, 51, 60, 68, 85, 102, 120, 136, 170, 204, 255, 257, 340, 408, 499, 510, 514, 680, 771, 998, 1020, 1028, 1285, 1497, 1542, 1996, 2040, 2056, 2495, 2570, 2994, 3084, 3855, 3992, 4369, 4990, 5140, 5988, 6168, 7485, 7710, 8483, 8738, 9980, 10280, 11976, 13107, 14970, 15420, 16966, 17476, 19960, 21845, 25449, 26214, 29940, 30840, 33932, 34952, 42415, 43690, 50898, 52428, 59880, 65535, 67864, 84830, 87380, 101796, 104856, 127245, 128243, 131070, 169660, 174760, 203592, 254490, 256486, 262140, 339320, 384729, 508980, 512972, 524280, 641215, 769458, 1017960, 1025944, 1282430, 1538916, 1923645, 2180131, 2564860, 3077832, 3847290, 4360262, 5129720, 6540393, 7694580, 8720524, 10900655, 13080786, 15389160, 17441048, 21801310, 26161572, 32701965, 43602620, 52323144, 65403930, 87205240, 130807860, 261615720]

約数ペア:

[(1, 261615720), (2, 130807860), (3, 87205240), (4, 65403930), (5, 52323144), (6, 43602620), (8, 32701965), (10, 26161572), (12, 21801310), (15, 17441048), (17, 15389160), (20, 13080786), (24, 10900655), (30, 8720524), (34, 7694580), (40, 6540393), (51, 5129720), (60, 4360262), (68, 3847290), (85, 3077832), (102, 2564860), (120, 2180131), (136, 1923645), (170, 1538916), (204, 1282430), (255, 1025944), (257, 1017960), (340, 769458), (408, 641215), (499, 524280), (510, 512972), (514, 508980), (680, 384729), (771, 339320), (998, 262140), (1020, 256486), (1028, 254490), (1285, 203592), (1497, 174760), (1542, 169660), (1996, 131070), (2040, 128243), (2056, 127245), (2495, 104856), (2570, 101796), (2994, 87380), (3084, 84830), (3855, 67864), (3992, 65535), (4369, 59880), (4990, 52428), (5140, 50898), (5988, 43690), (6168, 42415), (7485, 34952), (7710, 33932), (8483, 30840), (8738, 29940), (9980, 26214), (10280, 25449), (11976, 21845), (13107, 19960), (14970, 17476), (15420, 16966)]