19867900

素因数分解:

$2^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1$

素因数の和:104

約数の個数: 144

約数和(自身を含む): 52496640

約数和(自身を除く): 32628740

約数列:

[1, 2, 4, 5, 10, 13, 17, 20, 25, 26, 29, 31, 34, 50, 52, 58, 62, 65, 68, 85, 100, 116, 124, 130, 145, 155, 170, 221, 260, 290, 310, 325, 340, 377, 403, 425, 442, 493, 527, 580, 620, 650, 725, 754, 775, 806, 850, 884, 899, 986, 1054, 1105, 1300, 1450, 1508, 1550, 1612, 1700, 1798, 1885, 1972, 2015, 2108, 2210, 2465, 2635, 2900, 3100, 3596, 3770, 4030, 4420, 4495, 4930, 5270, 5525, 6409, 6851, 7540, 8060, 8990, 9425, 9860, 10075, 10540, 11050, 11687, 12325, 12818, 13175, 13702, 15283, 17980, 18850, 20150, 22100, 22475, 23374, 24650, 25636, 26350, 27404, 30566, 32045, 34255, 37700, 40300, 44950, 46748, 49300, 52700, 58435, 61132, 64090, 68510, 76415, 89900, 116870, 128180, 137020, 152830, 160225, 171275, 198679, 233740, 292175, 305660, 320450, 342550, 382075, 397358, 584350, 640900, 685100, 764150, 794716, 993395, 1168700, 1528300, 1986790, 3973580, 4966975, 9933950, 19867900]

約数ペア:

[(1, 19867900), (2, 9933950), (4, 4966975), (5, 3973580), (10, 1986790), (13, 1528300), (17, 1168700), (20, 993395), (25, 794716), (26, 764150), (29, 685100), (31, 640900), (34, 584350), (50, 397358), (52, 382075), (58, 342550), (62, 320450), (65, 305660), (68, 292175), (85, 233740), (100, 198679), (116, 171275), (124, 160225), (130, 152830), (145, 137020), (155, 128180), (170, 116870), (221, 89900), (260, 76415), (290, 68510), (310, 64090), (325, 61132), (340, 58435), (377, 52700), (403, 49300), (425, 46748), (442, 44950), (493, 40300), (527, 37700), (580, 34255), (620, 32045), (650, 30566), (725, 27404), (754, 26350), (775, 25636), (806, 24650), (850, 23374), (884, 22475), (899, 22100), (986, 20150), (1054, 18850), (1105, 17980), (1300, 15283), (1450, 13702), (1508, 13175), (1550, 12818), (1612, 12325), (1700, 11687), (1798, 11050), (1885, 10540), (1972, 10075), (2015, 9860), (2108, 9425), (2210, 8990), (2465, 8060), (2635, 7540), (2900, 6851), (3100, 6409), (3596, 5525), (3770, 5270), (4030, 4930), (4420, 4495)]