20309715

素因数分解:

$3^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{79}}^1\times {\mathrm{197}}^1$

素因数の和:316

約数の個数: 48

約数和(自身を含む): 37065600

約数和(自身を除く): 16755885

約数列:

[1, 3, 5, 9, 15, 29, 45, 79, 87, 145, 197, 237, 261, 395, 435, 591, 711, 985, 1185, 1305, 1773, 2291, 2955, 3555, 5713, 6873, 8865, 11455, 15563, 17139, 20619, 28565, 34365, 46689, 51417, 77815, 85695, 103095, 140067, 233445, 257085, 451327, 700335, 1353981, 2256635, 4061943, 6769905, 20309715]

約数ペア:

[(1, 20309715), (3, 6769905), (5, 4061943), (9, 2256635), (15, 1353981), (29, 700335), (45, 451327), (79, 257085), (87, 233445), (145, 140067), (197, 103095), (237, 85695), (261, 77815), (395, 51417), (435, 46689), (591, 34365), (711, 28565), (985, 20619), (1185, 17139), (1305, 15563), (1773, 11455), (2291, 8865), (2955, 6873), (3555, 5713)]