20771420

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{73}}^1\times {\mathrm{347}}^1$

素因数の和:470

約数の個数: 48

約数和(自身を含む): 45426528

約数和(自身を除く): 24655108

約数列:

[1, 2, 4, 5, 10, 20, 41, 73, 82, 146, 164, 205, 292, 347, 365, 410, 694, 730, 820, 1388, 1460, 1735, 2993, 3470, 5986, 6940, 11972, 14227, 14965, 25331, 28454, 29930, 50662, 56908, 59860, 71135, 101324, 126655, 142270, 253310, 284540, 506620, 1038571, 2077142, 4154284, 5192855, 10385710, 20771420]

約数ペア:

[(1, 20771420), (2, 10385710), (4, 5192855), (5, 4154284), (10, 2077142), (20, 1038571), (41, 506620), (73, 284540), (82, 253310), (146, 142270), (164, 126655), (205, 101324), (292, 71135), (347, 59860), (365, 56908), (410, 50662), (694, 29930), (730, 28454), (820, 25331), (1388, 14965), (1460, 14227), (1735, 11972), (2993, 6940), (3470, 5986)]