19991950

素因数分解:

$2^1\times 5^2\times {\mathrm{11}}^1\times {\mathrm{163}}^1\times {\mathrm{223}}^1$

素因数の和:409

約数の個数: 48

約数和(自身を含む): 40997376

約数和(自身を除く): 21005426

約数列:

[1, 2, 5, 10, 11, 22, 25, 50, 55, 110, 163, 223, 275, 326, 446, 550, 815, 1115, 1630, 1793, 2230, 2453, 3586, 4075, 4906, 5575, 8150, 8965, 11150, 12265, 17930, 24530, 36349, 44825, 61325, 72698, 89650, 122650, 181745, 363490, 399839, 799678, 908725, 1817450, 1999195, 3998390, 9995975, 19991950]

約数ペア:

[(1, 19991950), (2, 9995975), (5, 3998390), (10, 1999195), (11, 1817450), (22, 908725), (25, 799678), (50, 399839), (55, 363490), (110, 181745), (163, 122650), (223, 89650), (275, 72698), (326, 61325), (446, 44825), (550, 36349), (815, 24530), (1115, 17930), (1630, 12265), (1793, 11150), (2230, 8965), (2453, 8150), (3586, 5575), (4075, 4906)]