21397730

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{191}}^1\times {\mathrm{659}}^1$

素因数の和:874

約数の個数: 32

約数和(自身を含む): 41057280

約数和(自身を除く): 19659550

約数列:

[1, 2, 5, 10, 17, 34, 85, 170, 191, 382, 659, 955, 1318, 1910, 3247, 3295, 6494, 6590, 11203, 16235, 22406, 32470, 56015, 112030, 125869, 251738, 629345, 1258690, 2139773, 4279546, 10698865, 21397730]

約数ペア:

[(1, 21397730), (2, 10698865), (5, 4279546), (10, 2139773), (17, 1258690), (34, 629345), (85, 251738), (170, 125869), (191, 112030), (382, 56015), (659, 32470), (955, 22406), (1318, 16235), (1910, 11203), (3247, 6590), (3295, 6494)]