21124646420

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{97}}^1\times {\mathrm{640529}}^1$

素因数の和:640652

約数の個数: 48

約数和(自身を含む): 47455586640

約数和(自身を除く): 26330940220

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 97, 170, 194, 340, 388, 485, 970, 1649, 1940, 3298, 6596, 8245, 16490, 32980, 640529, 1281058, 2562116, 3202645, 6405290, 10888993, 12810580, 21777986, 43555972, 54444965, 62131313, 108889930, 124262626, 217779860, 248525252, 310656565, 621313130, 1056232321, 1242626260, 2112464642, 4224929284, 5281161605, 10562323210, 21124646420]

約数ペア:

[(1, 21124646420), (2, 10562323210), (4, 5281161605), (5, 4224929284), (10, 2112464642), (17, 1242626260), (20, 1056232321), (34, 621313130), (68, 310656565), (85, 248525252), (97, 217779860), (170, 124262626), (194, 108889930), (340, 62131313), (388, 54444965), (485, 43555972), (970, 21777986), (1649, 12810580), (1940, 10888993), (3298, 6405290), (6596, 3202645), (8245, 2562116), (16490, 1281058), (32980, 640529)]