21147950

素因数分解:

$2^1\times 5^2\times {\mathrm{19}}^1\times {\mathrm{113}}^1\times {\mathrm{197}}^1$

素因数の和:341

約数の個数: 48

約数和(自身を含む): 41983920

約数和(自身を除く): 20835970

約数列:

[1, 2, 5, 10, 19, 25, 38, 50, 95, 113, 190, 197, 226, 394, 475, 565, 950, 985, 1130, 1970, 2147, 2825, 3743, 4294, 4925, 5650, 7486, 9850, 10735, 18715, 21470, 22261, 37430, 44522, 53675, 93575, 107350, 111305, 187150, 222610, 422959, 556525, 845918, 1113050, 2114795, 4229590, 10573975, 21147950]

約数ペア:

[(1, 21147950), (2, 10573975), (5, 4229590), (10, 2114795), (19, 1113050), (25, 845918), (38, 556525), (50, 422959), (95, 222610), (113, 187150), (190, 111305), (197, 107350), (226, 93575), (394, 53675), (475, 44522), (565, 37430), (950, 22261), (985, 21470), (1130, 18715), (1970, 10735), (2147, 9850), (2825, 7486), (3743, 5650), (4294, 4925)]