19905640

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{73}}^1\times {\mathrm{401}}^1$

素因数の和:502

約数の個数: 64

約数和(自身を含む): 48191760

約数和(自身を除く): 28286120

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 73, 85, 136, 146, 170, 292, 340, 365, 401, 584, 680, 730, 802, 1241, 1460, 1604, 2005, 2482, 2920, 3208, 4010, 4964, 6205, 6817, 8020, 9928, 12410, 13634, 16040, 24820, 27268, 29273, 34085, 49640, 54536, 58546, 68170, 117092, 136340, 146365, 234184, 272680, 292730, 497641, 585460, 995282, 1170920, 1990564, 2488205, 3981128, 4976410, 9952820, 19905640]

約数ペア:

[(1, 19905640), (2, 9952820), (4, 4976410), (5, 3981128), (8, 2488205), (10, 1990564), (17, 1170920), (20, 995282), (34, 585460), (40, 497641), (68, 292730), (73, 272680), (85, 234184), (136, 146365), (146, 136340), (170, 117092), (292, 68170), (340, 58546), (365, 54536), (401, 49640), (584, 34085), (680, 29273), (730, 27268), (802, 24820), (1241, 16040), (1460, 13634), (1604, 12410), (2005, 9928), (2482, 8020), (2920, 6817), (3208, 6205), (4010, 4964)]