21066825

素因数分解:

$3^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1$

素因数の和:115

約数の個数: 96

約数和(自身を含む): 41997312

約数和(自身を除く): 20930487

約数列:

[1, 3, 5, 13, 15, 17, 25, 31, 39, 41, 51, 65, 75, 85, 93, 123, 155, 195, 205, 221, 255, 325, 403, 425, 465, 527, 533, 615, 663, 697, 775, 975, 1025, 1105, 1209, 1271, 1275, 1581, 1599, 2015, 2091, 2325, 2635, 2665, 3075, 3315, 3485, 3813, 5525, 6045, 6355, 6851, 7905, 7995, 9061, 10075, 10455, 13175, 13325, 16523, 16575, 17425, 19065, 20553, 21607, 27183, 30225, 31775, 34255, 39525, 39975, 45305, 49569, 52275, 64821, 82615, 95325, 102765, 108035, 135915, 171275, 226525, 247845, 280891, 324105, 413075, 513825, 540175, 679575, 842673, 1239225, 1404455, 1620525, 4213365, 7022275, 21066825]

約数ペア:

[(1, 21066825), (3, 7022275), (5, 4213365), (13, 1620525), (15, 1404455), (17, 1239225), (25, 842673), (31, 679575), (39, 540175), (41, 513825), (51, 413075), (65, 324105), (75, 280891), (85, 247845), (93, 226525), (123, 171275), (155, 135915), (195, 108035), (205, 102765), (221, 95325), (255, 82615), (325, 64821), (403, 52275), (425, 49569), (465, 45305), (527, 39975), (533, 39525), (615, 34255), (663, 31775), (697, 30225), (775, 27183), (975, 21607), (1025, 20553), (1105, 19065), (1209, 17425), (1271, 16575), (1275, 16523), (1581, 13325), (1599, 13175), (2015, 10455), (2091, 10075), (2325, 9061), (2635, 7995), (2665, 7905), (3075, 6851), (3315, 6355), (3485, 6045), (3813, 5525)]