21154868

素因数分解:

$2^2\times 7^3\times {\mathrm{17}}^1\times {\mathrm{907}}^1$

素因数の和:949

約数の個数: 48

約数和(自身を含む): 45763200

約数和(自身を除く): 24608332

約数列:

[1, 2, 4, 7, 14, 17, 28, 34, 49, 68, 98, 119, 196, 238, 343, 476, 686, 833, 907, 1372, 1666, 1814, 3332, 3628, 5831, 6349, 11662, 12698, 15419, 23324, 25396, 30838, 44443, 61676, 88886, 107933, 177772, 215866, 311101, 431732, 622202, 755531, 1244404, 1511062, 3022124, 5288717, 10577434, 21154868]

約数ペア:

[(1, 21154868), (2, 10577434), (4, 5288717), (7, 3022124), (14, 1511062), (17, 1244404), (28, 755531), (34, 622202), (49, 431732), (68, 311101), (98, 215866), (119, 177772), (196, 107933), (238, 88886), (343, 61676), (476, 44443), (686, 30838), (833, 25396), (907, 23324), (1372, 15419), (1666, 12698), (1814, 11662), (3332, 6349), (3628, 5831)]