20300020

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{163}}^1\times {\mathrm{479}}^1$

素因数の和:664

約数の個数: 48

約数和(自身を含む): 46287360

約数和(自身を除く): 25987340

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 163, 260, 326, 479, 652, 815, 958, 1630, 1916, 2119, 2395, 3260, 4238, 4790, 6227, 8476, 9580, 10595, 12454, 21190, 24908, 31135, 42380, 62270, 78077, 124540, 156154, 312308, 390385, 780770, 1015001, 1561540, 2030002, 4060004, 5075005, 10150010, 20300020]

約数ペア:

[(1, 20300020), (2, 10150010), (4, 5075005), (5, 4060004), (10, 2030002), (13, 1561540), (20, 1015001), (26, 780770), (52, 390385), (65, 312308), (130, 156154), (163, 124540), (260, 78077), (326, 62270), (479, 42380), (652, 31135), (815, 24908), (958, 21190), (1630, 12454), (1916, 10595), (2119, 9580), (2395, 8476), (3260, 6227), (4238, 4790)]