20954720

素因数分解:

$2^5\times 5^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{113}}^1$

素因数の和:208

約数の個数: 96

約数和(自身を含む): 53434080

約数和(自身を除く): 32479360

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 32, 38, 40, 61, 76, 80, 95, 113, 122, 152, 160, 190, 226, 244, 304, 305, 380, 452, 488, 565, 608, 610, 760, 904, 976, 1130, 1159, 1220, 1520, 1808, 1952, 2147, 2260, 2318, 2440, 3040, 3616, 4294, 4520, 4636, 4880, 5795, 6893, 8588, 9040, 9272, 9760, 10735, 11590, 13786, 17176, 18080, 18544, 21470, 23180, 27572, 34352, 34465, 37088, 42940, 46360, 55144, 68704, 68930, 85880, 92720, 110288, 130967, 137860, 171760, 185440, 220576, 261934, 275720, 343520, 523868, 551440, 654835, 1047736, 1102880, 1309670, 2095472, 2619340, 4190944, 5238680, 10477360, 20954720]

約数ペア:

[(1, 20954720), (2, 10477360), (4, 5238680), (5, 4190944), (8, 2619340), (10, 2095472), (16, 1309670), (19, 1102880), (20, 1047736), (32, 654835), (38, 551440), (40, 523868), (61, 343520), (76, 275720), (80, 261934), (95, 220576), (113, 185440), (122, 171760), (152, 137860), (160, 130967), (190, 110288), (226, 92720), (244, 85880), (304, 68930), (305, 68704), (380, 55144), (452, 46360), (488, 42940), (565, 37088), (608, 34465), (610, 34352), (760, 27572), (904, 23180), (976, 21470), (1130, 18544), (1159, 18080), (1220, 17176), (1520, 13786), (1808, 11590), (1952, 10735), (2147, 9760), (2260, 9272), (2318, 9040), (2440, 8588), (3040, 6893), (3616, 5795), (4294, 4880), (4520, 4636)]