20921950

素因数分解:

$2^1\times 5^2\times 7^1\times {\mathrm{23}}^2\times {\mathrm{113}}^1$

素因数の和:178

約数の個数: 72

約数和(自身を含む): 46903248

約数和(自身を除く): 25981298

約数列:

[1, 2, 5, 7, 10, 14, 23, 25, 35, 46, 50, 70, 113, 115, 161, 175, 226, 230, 322, 350, 529, 565, 575, 791, 805, 1058, 1130, 1150, 1582, 1610, 2599, 2645, 2825, 3703, 3955, 4025, 5198, 5290, 5650, 7406, 7910, 8050, 12995, 13225, 18193, 18515, 19775, 25990, 26450, 36386, 37030, 39550, 59777, 64975, 90965, 92575, 119554, 129950, 181930, 185150, 298885, 418439, 454825, 597770, 836878, 909650, 1494425, 2092195, 2988850, 4184390, 10460975, 20921950]

約数ペア:

[(1, 20921950), (2, 10460975), (5, 4184390), (7, 2988850), (10, 2092195), (14, 1494425), (23, 909650), (25, 836878), (35, 597770), (46, 454825), (50, 418439), (70, 298885), (113, 185150), (115, 181930), (161, 129950), (175, 119554), (226, 92575), (230, 90965), (322, 64975), (350, 59777), (529, 39550), (565, 37030), (575, 36386), (791, 26450), (805, 25990), (1058, 19775), (1130, 18515), (1150, 18193), (1582, 13225), (1610, 12995), (2599, 8050), (2645, 7910), (2825, 7406), (3703, 5650), (3955, 5290), (4025, 5198)]