20551455

素因数分解:

$3^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{47}}^1\times {\mathrm{79}}^1$

素因数の和:181

約数の個数: 64

約数和(自身を含む): 38707200

約数和(自身を除く): 18155745

約数列:

[1, 3, 5, 9, 15, 27, 41, 45, 47, 79, 123, 135, 141, 205, 235, 237, 369, 395, 423, 615, 705, 711, 1107, 1185, 1269, 1845, 1927, 2115, 2133, 3239, 3555, 3713, 5535, 5781, 6345, 9635, 9717, 10665, 11139, 16195, 17343, 18565, 28905, 29151, 33417, 48585, 52029, 55695, 86715, 87453, 100251, 145755, 152233, 167085, 260145, 437265, 456699, 501255, 761165, 1370097, 2283495, 4110291, 6850485, 20551455]

約数ペア:

[(1, 20551455), (3, 6850485), (5, 4110291), (9, 2283495), (15, 1370097), (27, 761165), (41, 501255), (45, 456699), (47, 437265), (79, 260145), (123, 167085), (135, 152233), (141, 145755), (205, 100251), (235, 87453), (237, 86715), (369, 55695), (395, 52029), (423, 48585), (615, 33417), (705, 29151), (711, 28905), (1107, 18565), (1185, 17343), (1269, 16195), (1845, 11139), (1927, 10665), (2115, 9717), (2133, 9635), (3239, 6345), (3555, 5781), (3713, 5535)]