81437480

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{127}}^1$

素因数の和:219

約数の個数: 128

約数和(自身を含む): 209018880

約数和(自身を除く): 127581400

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 23, 34, 40, 41, 46, 68, 82, 85, 92, 115, 127, 136, 164, 170, 184, 205, 230, 254, 328, 340, 391, 410, 460, 508, 635, 680, 697, 782, 820, 920, 943, 1016, 1270, 1394, 1564, 1640, 1886, 1955, 2159, 2540, 2788, 2921, 3128, 3485, 3772, 3910, 4318, 4715, 5080, 5207, 5576, 5842, 6970, 7544, 7820, 8636, 9430, 10414, 10795, 11684, 13940, 14605, 15640, 16031, 17272, 18860, 20828, 21590, 23368, 26035, 27880, 29210, 32062, 37720, 41656, 43180, 49657, 52070, 58420, 64124, 80155, 86360, 88519, 99314, 104140, 116840, 119761, 128248, 160310, 177038, 198628, 208280, 239522, 248285, 320620, 354076, 397256, 442595, 479044, 496570, 598805, 641240, 708152, 885190, 958088, 993140, 1197610, 1770380, 1986280, 2035937, 2395220, 3540760, 4071874, 4790440, 8143748, 10179685, 16287496, 20359370, 40718740, 81437480]

約数ペア:

[(1, 81437480), (2, 40718740), (4, 20359370), (5, 16287496), (8, 10179685), (10, 8143748), (17, 4790440), (20, 4071874), (23, 3540760), (34, 2395220), (40, 2035937), (41, 1986280), (46, 1770380), (68, 1197610), (82, 993140), (85, 958088), (92, 885190), (115, 708152), (127, 641240), (136, 598805), (164, 496570), (170, 479044), (184, 442595), (205, 397256), (230, 354076), (254, 320620), (328, 248285), (340, 239522), (391, 208280), (410, 198628), (460, 177038), (508, 160310), (635, 128248), (680, 119761), (697, 116840), (782, 104140), (820, 99314), (920, 88519), (943, 86360), (1016, 80155), (1270, 64124), (1394, 58420), (1564, 52070), (1640, 49657), (1886, 43180), (1955, 41656), (2159, 37720), (2540, 32062), (2788, 29210), (2921, 27880), (3128, 26035), (3485, 23368), (3772, 21590), (3910, 20828), (4318, 18860), (4715, 17272), (5080, 16031), (5207, 15640), (5576, 14605), (5842, 13940), (6970, 11684), (7544, 10795), (7820, 10414), (8636, 9430)]