21363280

素因数分解:

$2^4\times 5^1\times {\mathrm{97}}^1\times {\mathrm{2753}}^1$

素因数の和:2863

約数の個数: 40

約数和(自身を含む): 50199912

約数和(自身を除く): 28836632

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 97, 194, 388, 485, 776, 970, 1552, 1940, 2753, 3880, 5506, 7760, 11012, 13765, 22024, 27530, 44048, 55060, 110120, 220240, 267041, 534082, 1068164, 1335205, 2136328, 2670410, 4272656, 5340820, 10681640, 21363280]

約数ペア:

[(1, 21363280), (2, 10681640), (4, 5340820), (5, 4272656), (8, 2670410), (10, 2136328), (16, 1335205), (20, 1068164), (40, 534082), (80, 267041), (97, 220240), (194, 110120), (388, 55060), (485, 44048), (776, 27530), (970, 22024), (1552, 13765), (1940, 11012), (2753, 7760), (3880, 5506)]