21310900

素因数分解:

$2^2\times 5^2\times {\mathrm{13}}^3\times {\mathrm{97}}^1$

素因数の和:150

約数の個数: 72

約数和(自身を含む): 50613080

約数和(自身を除く): 29302180

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 50, 52, 65, 97, 100, 130, 169, 194, 260, 325, 338, 388, 485, 650, 676, 845, 970, 1261, 1300, 1690, 1940, 2197, 2425, 2522, 3380, 4225, 4394, 4850, 5044, 6305, 8450, 8788, 9700, 10985, 12610, 16393, 16900, 21970, 25220, 31525, 32786, 43940, 54925, 63050, 65572, 81965, 109850, 126100, 163930, 213109, 219700, 327860, 409825, 426218, 819650, 852436, 1065545, 1639300, 2131090, 4262180, 5327725, 10655450, 21310900]

約数ペア:

[(1, 21310900), (2, 10655450), (4, 5327725), (5, 4262180), (10, 2131090), (13, 1639300), (20, 1065545), (25, 852436), (26, 819650), (50, 426218), (52, 409825), (65, 327860), (97, 219700), (100, 213109), (130, 163930), (169, 126100), (194, 109850), (260, 81965), (325, 65572), (338, 63050), (388, 54925), (485, 43940), (650, 32786), (676, 31525), (845, 25220), (970, 21970), (1261, 16900), (1300, 16393), (1690, 12610), (1940, 10985), (2197, 9700), (2425, 8788), (2522, 8450), (3380, 6305), (4225, 5044), (4394, 4850)]