21480650

素因数分解:

$2^1\times 5^2\times {\mathrm{43}}^1\times {\mathrm{97}}^1\times {\mathrm{103}}^1$

素因数の和:255

約数の個数: 48

約数和(自身を含む): 41705664

約数和(自身を除く): 20225014

約数列:

[1, 2, 5, 10, 25, 43, 50, 86, 97, 103, 194, 206, 215, 430, 485, 515, 970, 1030, 1075, 2150, 2425, 2575, 4171, 4429, 4850, 5150, 8342, 8858, 9991, 19982, 20855, 22145, 41710, 44290, 49955, 99910, 104275, 110725, 208550, 221450, 249775, 429613, 499550, 859226, 2148065, 4296130, 10740325, 21480650]

約数ペア:

[(1, 21480650), (2, 10740325), (5, 4296130), (10, 2148065), (25, 859226), (43, 499550), (50, 429613), (86, 249775), (97, 221450), (103, 208550), (194, 110725), (206, 104275), (215, 99910), (430, 49955), (485, 44290), (515, 41710), (970, 22145), (1030, 20855), (1075, 19982), (2150, 9991), (2425, 8858), (2575, 8342), (4171, 5150), (4429, 4850)]