21528388

素因数分解:

$2^2\times 7^1\times {\mathrm{53}}^1\times {\mathrm{89}}^1\times {\mathrm{163}}^1$

素因数の和:316

約数の個数: 48

約数和(自身を含む): 44634240

約数和(自身を除く): 23105852

約数列:

[1, 2, 4, 7, 14, 28, 53, 89, 106, 163, 178, 212, 326, 356, 371, 623, 652, 742, 1141, 1246, 1484, 2282, 2492, 4564, 4717, 8639, 9434, 14507, 17278, 18868, 29014, 33019, 34556, 58028, 60473, 66038, 101549, 120946, 132076, 203098, 241892, 406196, 768871, 1537742, 3075484, 5382097, 10764194, 21528388]

約数ペア:

[(1, 21528388), (2, 10764194), (4, 5382097), (7, 3075484), (14, 1537742), (28, 768871), (53, 406196), (89, 241892), (106, 203098), (163, 132076), (178, 120946), (212, 101549), (326, 66038), (356, 60473), (371, 58028), (623, 34556), (652, 33019), (742, 29014), (1141, 18868), (1246, 17278), (1484, 14507), (2282, 9434), (2492, 8639), (4564, 4717)]