20984980

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{97}}^1\times {\mathrm{373}}^1$

素因数の和:508

約数の個数: 48

約数和(自身を含む): 46181520

約数和(自身を除く): 25196540

約数列:

[1, 2, 4, 5, 10, 20, 29, 58, 97, 116, 145, 194, 290, 373, 388, 485, 580, 746, 970, 1492, 1865, 1940, 2813, 3730, 5626, 7460, 10817, 11252, 14065, 21634, 28130, 36181, 43268, 54085, 56260, 72362, 108170, 144724, 180905, 216340, 361810, 723620, 1049249, 2098498, 4196996, 5246245, 10492490, 20984980]

約数ペア:

[(1, 20984980), (2, 10492490), (4, 5246245), (5, 4196996), (10, 2098498), (20, 1049249), (29, 723620), (58, 361810), (97, 216340), (116, 180905), (145, 144724), (194, 108170), (290, 72362), (373, 56260), (388, 54085), (485, 43268), (580, 36181), (746, 28130), (970, 21634), (1492, 14065), (1865, 11252), (1940, 10817), (2813, 7460), (3730, 5626)]