19995495

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{41}}^2\times {\mathrm{61}}^1$

素因数の和:164

約数の個数: 48

約数和(自身を含む): 35893536

約数和(自身を除く): 15898041

約数列:

[1, 3, 5, 13, 15, 39, 41, 61, 65, 123, 183, 195, 205, 305, 533, 615, 793, 915, 1599, 1681, 2379, 2501, 2665, 3965, 5043, 7503, 7995, 8405, 11895, 12505, 21853, 25215, 32513, 37515, 65559, 97539, 102541, 109265, 162565, 307623, 327795, 487695, 512705, 1333033, 1538115, 3999099, 6665165, 19995495]

約数ペア:

[(1, 19995495), (3, 6665165), (5, 3999099), (13, 1538115), (15, 1333033), (39, 512705), (41, 487695), (61, 327795), (65, 307623), (123, 162565), (183, 109265), (195, 102541), (205, 97539), (305, 65559), (533, 37515), (615, 32513), (793, 25215), (915, 21853), (1599, 12505), (1681, 11895), (2379, 8405), (2501, 7995), (2665, 7503), (3965, 5043)]