187021820

素因数分解:

$2^2\times 5^1\times {\mathrm{97}}^1\times {\mathrm{149}}^1\times {\mathrm{647}}^1$

素因数の和:902

約数の個数: 48

約数和(自身を含む): 400075200

約数和(自身を除く): 213053380

約数列:

[1, 2, 4, 5, 10, 20, 97, 149, 194, 298, 388, 485, 596, 647, 745, 970, 1294, 1490, 1940, 2588, 2980, 3235, 6470, 12940, 14453, 28906, 57812, 62759, 72265, 96403, 125518, 144530, 192806, 251036, 289060, 313795, 385612, 482015, 627590, 964030, 1255180, 1928060, 9351091, 18702182, 37404364, 46755455, 93510910, 187021820]

約数ペア:

[(1, 187021820), (2, 93510910), (4, 46755455), (5, 37404364), (10, 18702182), (20, 9351091), (97, 1928060), (149, 1255180), (194, 964030), (298, 627590), (388, 482015), (485, 385612), (596, 313795), (647, 289060), (745, 251036), (970, 192806), (1294, 144530), (1490, 125518), (1940, 96403), (2588, 72265), (2980, 62759), (3235, 57812), (6470, 28906), (12940, 14453)]