20821710

素因数分解:

$2^1\times 3^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{263}}^1$

素因数の和:322

約数の個数: 128

約数和(自身を含む): 63866880

約数和(自身を除く): 43045170

約数列:

[1, 2, 3, 5, 6, 7, 10, 13, 14, 15, 21, 26, 29, 30, 35, 39, 42, 58, 65, 70, 78, 87, 91, 105, 130, 145, 174, 182, 195, 203, 210, 263, 273, 290, 377, 390, 406, 435, 455, 526, 546, 609, 754, 789, 870, 910, 1015, 1131, 1218, 1315, 1365, 1578, 1841, 1885, 2030, 2262, 2630, 2639, 2730, 3045, 3419, 3682, 3770, 3945, 5278, 5523, 5655, 6090, 6838, 7627, 7890, 7917, 9205, 10257, 11046, 11310, 13195, 15254, 15834, 17095, 18410, 20514, 22881, 23933, 26390, 27615, 34190, 38135, 39585, 45762, 47866, 51285, 53389, 55230, 71799, 76270, 79170, 99151, 102570, 106778, 114405, 119665, 143598, 160167, 198302, 228810, 239330, 266945, 297453, 320334, 358995, 495755, 533890, 594906, 694057, 717990, 800835, 991510, 1388114, 1487265, 1601670, 2082171, 2974530, 3470285, 4164342, 6940570, 10410855, 20821710]

約数ペア:

[(1, 20821710), (2, 10410855), (3, 6940570), (5, 4164342), (6, 3470285), (7, 2974530), (10, 2082171), (13, 1601670), (14, 1487265), (15, 1388114), (21, 991510), (26, 800835), (29, 717990), (30, 694057), (35, 594906), (39, 533890), (42, 495755), (58, 358995), (65, 320334), (70, 297453), (78, 266945), (87, 239330), (91, 228810), (105, 198302), (130, 160167), (145, 143598), (174, 119665), (182, 114405), (195, 106778), (203, 102570), (210, 99151), (263, 79170), (273, 76270), (290, 71799), (377, 55230), (390, 53389), (406, 51285), (435, 47866), (455, 45762), (526, 39585), (546, 38135), (609, 34190), (754, 27615), (789, 26390), (870, 23933), (910, 22881), (1015, 20514), (1131, 18410), (1218, 17095), (1315, 15834), (1365, 15254), (1578, 13195), (1841, 11310), (1885, 11046), (2030, 10257), (2262, 9205), (2630, 7917), (2639, 7890), (2730, 7627), (3045, 6838), (3419, 6090), (3682, 5655), (3770, 5523), (3945, 5278)]