21712480

素因数分解:

$2^5\times 5^1\times {\mathrm{97}}^1\times {\mathrm{1399}}^1$

素因数の和:1511

約数の個数: 48

約数和(自身を含む): 51861600

約数和(自身を除く): 30149120

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 97, 160, 194, 388, 485, 776, 970, 1399, 1552, 1940, 2798, 3104, 3880, 5596, 6995, 7760, 11192, 13990, 15520, 22384, 27980, 44768, 55960, 111920, 135703, 223840, 271406, 542812, 678515, 1085624, 1357030, 2171248, 2714060, 4342496, 5428120, 10856240, 21712480]

約数ペア:

[(1, 21712480), (2, 10856240), (4, 5428120), (5, 4342496), (8, 2714060), (10, 2171248), (16, 1357030), (20, 1085624), (32, 678515), (40, 542812), (80, 271406), (97, 223840), (160, 135703), (194, 111920), (388, 55960), (485, 44768), (776, 27980), (970, 22384), (1399, 15520), (1552, 13990), (1940, 11192), (2798, 7760), (3104, 6995), (3880, 5596)]