20558440

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{617}}^1$

素因数の和:659

約数の個数: 96

約数和(自身を含む): 57066120

約数和(自身を除く): 36507680

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 17, 20, 28, 34, 35, 40, 49, 56, 68, 70, 85, 98, 119, 136, 140, 170, 196, 238, 245, 280, 340, 392, 476, 490, 595, 617, 680, 833, 952, 980, 1190, 1234, 1666, 1960, 2380, 2468, 3085, 3332, 4165, 4319, 4760, 4936, 6170, 6664, 8330, 8638, 10489, 12340, 16660, 17276, 20978, 21595, 24680, 30233, 33320, 34552, 41956, 43190, 52445, 60466, 73423, 83912, 86380, 104890, 120932, 146846, 151165, 172760, 209780, 241864, 293692, 302330, 367115, 419560, 513961, 587384, 604660, 734230, 1027922, 1209320, 1468460, 2055844, 2569805, 2936920, 4111688, 5139610, 10279220, 20558440]

約数ペア:

[(1, 20558440), (2, 10279220), (4, 5139610), (5, 4111688), (7, 2936920), (8, 2569805), (10, 2055844), (14, 1468460), (17, 1209320), (20, 1027922), (28, 734230), (34, 604660), (35, 587384), (40, 513961), (49, 419560), (56, 367115), (68, 302330), (70, 293692), (85, 241864), (98, 209780), (119, 172760), (136, 151165), (140, 146846), (170, 120932), (196, 104890), (238, 86380), (245, 83912), (280, 73423), (340, 60466), (392, 52445), (476, 43190), (490, 41956), (595, 34552), (617, 33320), (680, 30233), (833, 24680), (952, 21595), (980, 20978), (1190, 17276), (1234, 16660), (1666, 12340), (1960, 10489), (2380, 8638), (2468, 8330), (3085, 6664), (3332, 6170), (4165, 4936), (4319, 4760)]