19946980

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{103}}^1\times {\mathrm{421}}^1$

素因数の和:556

約数の個数: 48

約数和(自身を含む): 44239104

約数和(自身を除く): 24292124

約数列:

[1, 2, 4, 5, 10, 20, 23, 46, 92, 103, 115, 206, 230, 412, 421, 460, 515, 842, 1030, 1684, 2060, 2105, 2369, 4210, 4738, 8420, 9476, 9683, 11845, 19366, 23690, 38732, 43363, 47380, 48415, 86726, 96830, 173452, 193660, 216815, 433630, 867260, 997349, 1994698, 3989396, 4986745, 9973490, 19946980]

約数ペア:

[(1, 19946980), (2, 9973490), (4, 4986745), (5, 3989396), (10, 1994698), (20, 997349), (23, 867260), (46, 433630), (92, 216815), (103, 193660), (115, 173452), (206, 96830), (230, 86726), (412, 48415), (421, 47380), (460, 43363), (515, 38732), (842, 23690), (1030, 19366), (1684, 11845), (2060, 9683), (2105, 9476), (2369, 8420), (4210, 4738)]