16818920

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^2\times {\mathrm{113}}^1$

素因数の和:246

約数の個数: 48

約数和(自身を含む): 38813580

約数和(自身を除く): 21994660

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 113, 122, 226, 244, 305, 452, 488, 565, 610, 904, 1130, 1220, 2260, 2440, 3721, 4520, 6893, 7442, 13786, 14884, 18605, 27572, 29768, 34465, 37210, 55144, 68930, 74420, 137860, 148840, 275720, 420473, 840946, 1681892, 2102365, 3363784, 4204730, 8409460, 16818920]

約数ペア:

[(1, 16818920), (2, 8409460), (4, 4204730), (5, 3363784), (8, 2102365), (10, 1681892), (20, 840946), (40, 420473), (61, 275720), (113, 148840), (122, 137860), (226, 74420), (244, 68930), (305, 55144), (452, 37210), (488, 34465), (565, 29768), (610, 27572), (904, 18605), (1130, 14884), (1220, 13786), (2260, 7442), (2440, 6893), (3721, 4520)]