20874980

素因数分解:

$2^2\times 5^1\times 7^3\times {\mathrm{17}}^1\times {\mathrm{179}}^1$

素因数の和:226

約数の個数: 96

約数和(自身を含む): 54432000

約数和(自身を除く): 33557020

約数列:

[1, 2, 4, 5, 7, 10, 14, 17, 20, 28, 34, 35, 49, 68, 70, 85, 98, 119, 140, 170, 179, 196, 238, 245, 340, 343, 358, 476, 490, 595, 686, 716, 833, 895, 980, 1190, 1253, 1372, 1666, 1715, 1790, 2380, 2506, 3043, 3332, 3430, 3580, 4165, 5012, 5831, 6086, 6265, 6860, 8330, 8771, 11662, 12172, 12530, 15215, 16660, 17542, 21301, 23324, 25060, 29155, 30430, 35084, 42602, 43855, 58310, 60860, 61397, 85204, 87710, 106505, 116620, 122794, 149107, 175420, 213010, 245588, 298214, 306985, 426020, 596428, 613970, 745535, 1043749, 1227940, 1491070, 2087498, 2982140, 4174996, 5218745, 10437490, 20874980]

約数ペア:

[(1, 20874980), (2, 10437490), (4, 5218745), (5, 4174996), (7, 2982140), (10, 2087498), (14, 1491070), (17, 1227940), (20, 1043749), (28, 745535), (34, 613970), (35, 596428), (49, 426020), (68, 306985), (70, 298214), (85, 245588), (98, 213010), (119, 175420), (140, 149107), (170, 122794), (179, 116620), (196, 106505), (238, 87710), (245, 85204), (340, 61397), (343, 60860), (358, 58310), (476, 43855), (490, 42602), (595, 35084), (686, 30430), (716, 29155), (833, 25060), (895, 23324), (980, 21301), (1190, 17542), (1253, 16660), (1372, 15215), (1666, 12530), (1715, 12172), (1790, 11662), (2380, 8771), (2506, 8330), (3043, 6860), (3332, 6265), (3430, 6086), (3580, 5831), (4165, 5012)]