19645965

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{421}}^1$

素因数の和:510

約数の個数: 48

約数和(自身を含む): 36734256

約数和(自身を除く): 17088291

約数列:

[1, 3, 5, 9, 15, 17, 45, 51, 61, 85, 153, 183, 255, 305, 421, 549, 765, 915, 1037, 1263, 2105, 2745, 3111, 3789, 5185, 6315, 7157, 9333, 15555, 18945, 21471, 25681, 35785, 46665, 64413, 77043, 107355, 128405, 231129, 322065, 385215, 436577, 1155645, 1309731, 2182885, 3929193, 6548655, 19645965]

約数ペア:

[(1, 19645965), (3, 6548655), (5, 3929193), (9, 2182885), (15, 1309731), (17, 1155645), (45, 436577), (51, 385215), (61, 322065), (85, 231129), (153, 128405), (183, 107355), (255, 77043), (305, 64413), (421, 46665), (549, 35785), (765, 25681), (915, 21471), (1037, 18945), (1263, 15555), (2105, 9333), (2745, 7157), (3111, 6315), (3789, 5185)]