21130980

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{27091}}^1$

素因数の和:27116

約数の個数: 48

約数和(自身を含む): 63720384

約数和(自身を除く): 42589404

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 195, 260, 390, 780, 27091, 54182, 81273, 108364, 135455, 162546, 270910, 325092, 352183, 406365, 541820, 704366, 812730, 1056549, 1408732, 1625460, 1760915, 2113098, 3521830, 4226196, 5282745, 7043660, 10565490, 21130980]

約数ペア:

[(1, 21130980), (2, 10565490), (3, 7043660), (4, 5282745), (5, 4226196), (6, 3521830), (10, 2113098), (12, 1760915), (13, 1625460), (15, 1408732), (20, 1056549), (26, 812730), (30, 704366), (39, 541820), (52, 406365), (60, 352183), (65, 325092), (78, 270910), (130, 162546), (156, 135455), (195, 108364), (260, 81273), (390, 54182), (780, 27091)]