21787060

素因数分解:

$2^2\times 5^1\times {\mathrm{67}}^1\times {\mathrm{71}}^1\times {\mathrm{229}}^1$

素因数の和:376

約数の個数: 48

約数和(自身を含む): 47295360

約数和(自身を除く): 25508300

約数列:

[1, 2, 4, 5, 10, 20, 67, 71, 134, 142, 229, 268, 284, 335, 355, 458, 670, 710, 916, 1145, 1340, 1420, 2290, 4580, 4757, 9514, 15343, 16259, 19028, 23785, 30686, 32518, 47570, 61372, 65036, 76715, 81295, 95140, 153430, 162590, 306860, 325180, 1089353, 2178706, 4357412, 5446765, 10893530, 21787060]

約数ペア:

[(1, 21787060), (2, 10893530), (4, 5446765), (5, 4357412), (10, 2178706), (20, 1089353), (67, 325180), (71, 306860), (134, 162590), (142, 153430), (229, 95140), (268, 81295), (284, 76715), (335, 65036), (355, 61372), (458, 47570), (670, 32518), (710, 30686), (916, 23785), (1145, 19028), (1340, 16259), (1420, 15343), (2290, 9514), (4580, 4757)]