21198420

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{131}}^1$

素因数の和:206

約数の個数: 144

約数和(自身を含む): 69189120

約数和(自身を除く): 47990700

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 29, 30, 31, 36, 45, 58, 60, 62, 87, 90, 93, 116, 124, 131, 145, 155, 174, 180, 186, 261, 262, 279, 290, 310, 348, 372, 393, 435, 465, 522, 524, 558, 580, 620, 655, 786, 870, 899, 930, 1044, 1116, 1179, 1305, 1310, 1395, 1572, 1740, 1798, 1860, 1965, 2358, 2610, 2620, 2697, 2790, 3596, 3799, 3930, 4061, 4495, 4716, 5220, 5394, 5580, 5895, 7598, 7860, 8091, 8122, 8990, 10788, 11397, 11790, 12183, 13485, 15196, 16182, 16244, 17980, 18995, 20305, 22794, 23580, 24366, 26970, 32364, 34191, 36549, 37990, 40455, 40610, 45588, 48732, 53940, 56985, 60915, 68382, 73098, 75980, 80910, 81220, 113970, 117769, 121830, 136764, 146196, 161820, 170955, 182745, 227940, 235538, 243660, 341910, 353307, 365490, 471076, 588845, 683820, 706614, 730980, 1059921, 1177690, 1413228, 1766535, 2119842, 2355380, 3533070, 4239684, 5299605, 7066140, 10599210, 21198420]

約数ペア:

[(1, 21198420), (2, 10599210), (3, 7066140), (4, 5299605), (5, 4239684), (6, 3533070), (9, 2355380), (10, 2119842), (12, 1766535), (15, 1413228), (18, 1177690), (20, 1059921), (29, 730980), (30, 706614), (31, 683820), (36, 588845), (45, 471076), (58, 365490), (60, 353307), (62, 341910), (87, 243660), (90, 235538), (93, 227940), (116, 182745), (124, 170955), (131, 161820), (145, 146196), (155, 136764), (174, 121830), (180, 117769), (186, 113970), (261, 81220), (262, 80910), (279, 75980), (290, 73098), (310, 68382), (348, 60915), (372, 56985), (393, 53940), (435, 48732), (465, 45588), (522, 40610), (524, 40455), (558, 37990), (580, 36549), (620, 34191), (655, 32364), (786, 26970), (870, 24366), (899, 23580), (930, 22794), (1044, 20305), (1116, 18995), (1179, 17980), (1305, 16244), (1310, 16182), (1395, 15196), (1572, 13485), (1740, 12183), (1798, 11790), (1860, 11397), (1965, 10788), (2358, 8990), (2610, 8122), (2620, 8091), (2697, 7860), (2790, 7598), (3596, 5895), (3799, 5580), (3930, 5394), (4061, 5220), (4495, 4716)]