20989590

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{53}}^1\times {\mathrm{307}}^1$

素因数の和:413

約数の個数: 64

約数和(自身を含む): 52690176

約数和(自身を除く): 31700586

約数列:

[1, 2, 3, 5, 6, 10, 15, 30, 43, 53, 86, 106, 129, 159, 215, 258, 265, 307, 318, 430, 530, 614, 645, 795, 921, 1290, 1535, 1590, 1842, 2279, 3070, 4558, 4605, 6837, 9210, 11395, 13201, 13674, 16271, 22790, 26402, 32542, 34185, 39603, 48813, 66005, 68370, 79206, 81355, 97626, 132010, 162710, 198015, 244065, 396030, 488130, 699653, 1399306, 2098959, 3498265, 4197918, 6996530, 10494795, 20989590]

約数ペア:

[(1, 20989590), (2, 10494795), (3, 6996530), (5, 4197918), (6, 3498265), (10, 2098959), (15, 1399306), (30, 699653), (43, 488130), (53, 396030), (86, 244065), (106, 198015), (129, 162710), (159, 132010), (215, 97626), (258, 81355), (265, 79206), (307, 68370), (318, 66005), (430, 48813), (530, 39603), (614, 34185), (645, 32542), (795, 26402), (921, 22790), (1290, 16271), (1535, 13674), (1590, 13201), (1842, 11395), (2279, 9210), (3070, 6837), (4558, 4605)]