21988700

素因数分解:

$2^2\times 5^2\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{163}}^1$

素因数の和:267

約数の個数: 72

約数和(自身を含む): 51246720

約数和(自身を除く): 29258020

約数列:

[1, 2, 4, 5, 10, 19, 20, 25, 38, 50, 71, 76, 95, 100, 142, 163, 190, 284, 326, 355, 380, 475, 652, 710, 815, 950, 1349, 1420, 1630, 1775, 1900, 2698, 3097, 3260, 3550, 4075, 5396, 6194, 6745, 7100, 8150, 11573, 12388, 13490, 15485, 16300, 23146, 26980, 30970, 33725, 46292, 57865, 61940, 67450, 77425, 115730, 134900, 154850, 219887, 231460, 289325, 309700, 439774, 578650, 879548, 1099435, 1157300, 2198870, 4397740, 5497175, 10994350, 21988700]

約数ペア:

[(1, 21988700), (2, 10994350), (4, 5497175), (5, 4397740), (10, 2198870), (19, 1157300), (20, 1099435), (25, 879548), (38, 578650), (50, 439774), (71, 309700), (76, 289325), (95, 231460), (100, 219887), (142, 154850), (163, 134900), (190, 115730), (284, 77425), (326, 67450), (355, 61940), (380, 57865), (475, 46292), (652, 33725), (710, 30970), (815, 26980), (950, 23146), (1349, 16300), (1420, 15485), (1630, 13490), (1775, 12388), (1900, 11573), (2698, 8150), (3097, 7100), (3260, 6745), (3550, 6194), (4075, 5396)]