21274820

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{1277}}^1$

素因数の和:1317

約数の個数: 72

約数和(自身を含む): 55071576

約数和(自身を除く): 33796756

約数列:

[1, 2, 4, 5, 7, 10, 14, 17, 20, 28, 34, 35, 49, 68, 70, 85, 98, 119, 140, 170, 196, 238, 245, 340, 476, 490, 595, 833, 980, 1190, 1277, 1666, 2380, 2554, 3332, 4165, 5108, 6385, 8330, 8939, 12770, 16660, 17878, 21709, 25540, 35756, 43418, 44695, 62573, 86836, 89390, 108545, 125146, 151963, 178780, 217090, 250292, 303926, 312865, 434180, 607852, 625730, 759815, 1063741, 1251460, 1519630, 2127482, 3039260, 4254964, 5318705, 10637410, 21274820]

約数ペア:

[(1, 21274820), (2, 10637410), (4, 5318705), (5, 4254964), (7, 3039260), (10, 2127482), (14, 1519630), (17, 1251460), (20, 1063741), (28, 759815), (34, 625730), (35, 607852), (49, 434180), (68, 312865), (70, 303926), (85, 250292), (98, 217090), (119, 178780), (140, 151963), (170, 125146), (196, 108545), (238, 89390), (245, 86836), (340, 62573), (476, 44695), (490, 43418), (595, 35756), (833, 25540), (980, 21709), (1190, 17878), (1277, 16660), (1666, 12770), (2380, 8939), (2554, 8330), (3332, 6385), (4165, 5108)]