643440820

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{4001}}^1$

素因数の和:4081

約数の個数: 96

約数和(自身を含む): 1597470336

約数和(自身を除く): 954029516

約数列:

[1, 2, 4, 5, 10, 11, 17, 20, 22, 34, 43, 44, 55, 68, 85, 86, 110, 170, 172, 187, 215, 220, 340, 374, 430, 473, 731, 748, 860, 935, 946, 1462, 1870, 1892, 2365, 2924, 3655, 3740, 4001, 4730, 7310, 8002, 8041, 9460, 14620, 16004, 16082, 20005, 32164, 40010, 40205, 44011, 68017, 80020, 80410, 88022, 136034, 160820, 172043, 176044, 220055, 272068, 340085, 344086, 440110, 680170, 688172, 748187, 860215, 880220, 1360340, 1496374, 1720430, 1892473, 2924731, 2992748, 3440860, 3740935, 3784946, 5849462, 7481870, 7569892, 9462365, 11698924, 14623655, 14963740, 18924730, 29247310, 32172041, 37849460, 58494620, 64344082, 128688164, 160860205, 321720410, 643440820]

約数ペア:

[(1, 643440820), (2, 321720410), (4, 160860205), (5, 128688164), (10, 64344082), (11, 58494620), (17, 37849460), (20, 32172041), (22, 29247310), (34, 18924730), (43, 14963740), (44, 14623655), (55, 11698924), (68, 9462365), (85, 7569892), (86, 7481870), (110, 5849462), (170, 3784946), (172, 3740935), (187, 3440860), (215, 2992748), (220, 2924731), (340, 1892473), (374, 1720430), (430, 1496374), (473, 1360340), (731, 880220), (748, 860215), (860, 748187), (935, 688172), (946, 680170), (1462, 440110), (1870, 344086), (1892, 340085), (2365, 272068), (2924, 220055), (3655, 176044), (3740, 172043), (4001, 160820), (4730, 136034), (7310, 88022), (8002, 80410), (8041, 80020), (9460, 68017), (14620, 44011), (16004, 40205), (16082, 40010), (20005, 32164)]