78861720

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{223}}^1\times {\mathrm{421}}^1$

素因数の和:665

約数の個数: 128

約数和(自身を含む): 272240640

約数和(自身を除く): 193378920

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 120, 140, 168, 210, 223, 280, 420, 421, 446, 669, 840, 842, 892, 1115, 1263, 1338, 1561, 1684, 1784, 2105, 2230, 2526, 2676, 2947, 3122, 3345, 3368, 4210, 4460, 4683, 5052, 5352, 5894, 6244, 6315, 6690, 7805, 8420, 8841, 8920, 9366, 10104, 11788, 12488, 12630, 13380, 14735, 15610, 16840, 17682, 18732, 23415, 23576, 25260, 26760, 29470, 31220, 35364, 37464, 44205, 46830, 50520, 58940, 62440, 70728, 88410, 93660, 93883, 117880, 176820, 187320, 187766, 281649, 353640, 375532, 469415, 563298, 657181, 751064, 938830, 1126596, 1314362, 1408245, 1877660, 1971543, 2253192, 2628724, 2816490, 3285905, 3755320, 3943086, 5257448, 5632980, 6571810, 7886172, 9857715, 11265960, 13143620, 15772344, 19715430, 26287240, 39430860, 78861720]

約数ペア:

[(1, 78861720), (2, 39430860), (3, 26287240), (4, 19715430), (5, 15772344), (6, 13143620), (7, 11265960), (8, 9857715), (10, 7886172), (12, 6571810), (14, 5632980), (15, 5257448), (20, 3943086), (21, 3755320), (24, 3285905), (28, 2816490), (30, 2628724), (35, 2253192), (40, 1971543), (42, 1877660), (56, 1408245), (60, 1314362), (70, 1126596), (84, 938830), (105, 751064), (120, 657181), (140, 563298), (168, 469415), (210, 375532), (223, 353640), (280, 281649), (420, 187766), (421, 187320), (446, 176820), (669, 117880), (840, 93883), (842, 93660), (892, 88410), (1115, 70728), (1263, 62440), (1338, 58940), (1561, 50520), (1684, 46830), (1784, 44205), (2105, 37464), (2230, 35364), (2526, 31220), (2676, 29470), (2947, 26760), (3122, 25260), (3345, 23576), (3368, 23415), (4210, 18732), (4460, 17682), (4683, 16840), (5052, 15610), (5352, 14735), (5894, 13380), (6244, 12630), (6315, 12488), (6690, 11788), (7805, 10104), (8420, 9366), (8841, 8920)]