209817020

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{347}}^1\times {\mathrm{617}}^1$

素因数の和:987

約数の個数: 72

約数和(自身を含む): 514863216

約数和(自身を除く): 305046196

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 347, 490, 617, 694, 980, 1234, 1388, 1735, 2429, 2468, 3085, 3470, 4319, 4858, 6170, 6940, 8638, 9716, 12145, 12340, 17003, 17276, 21595, 24290, 30233, 34006, 43190, 48580, 60466, 68012, 85015, 86380, 120932, 151165, 170030, 214099, 302330, 340060, 428198, 604660, 856396, 1070495, 1498693, 2140990, 2997386, 4281980, 5994772, 7493465, 10490851, 14986930, 20981702, 29973860, 41963404, 52454255, 104908510, 209817020]

約数ペア:

[(1, 209817020), (2, 104908510), (4, 52454255), (5, 41963404), (7, 29973860), (10, 20981702), (14, 14986930), (20, 10490851), (28, 7493465), (35, 5994772), (49, 4281980), (70, 2997386), (98, 2140990), (140, 1498693), (196, 1070495), (245, 856396), (347, 604660), (490, 428198), (617, 340060), (694, 302330), (980, 214099), (1234, 170030), (1388, 151165), (1735, 120932), (2429, 86380), (2468, 85015), (3085, 68012), (3470, 60466), (4319, 48580), (4858, 43190), (6170, 34006), (6940, 30233), (8638, 24290), (9716, 21595), (12145, 17276), (12340, 17003)]