20287980

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{269}}^1\times {\mathrm{419}}^1$

素因数の和:703

約数の個数: 72

約数和(自身を含む): 61916400

約数和(自身を除く): 41628420

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 269, 419, 538, 807, 838, 1076, 1257, 1345, 1614, 1676, 2095, 2421, 2514, 2690, 3228, 3771, 4035, 4190, 4842, 5028, 5380, 6285, 7542, 8070, 8380, 9684, 12105, 12570, 15084, 16140, 18855, 24210, 25140, 37710, 48420, 75420, 112711, 225422, 338133, 450844, 563555, 676266, 1014399, 1127110, 1352532, 1690665, 2028798, 2254220, 3381330, 4057596, 5071995, 6762660, 10143990, 20287980]

約数ペア:

[(1, 20287980), (2, 10143990), (3, 6762660), (4, 5071995), (5, 4057596), (6, 3381330), (9, 2254220), (10, 2028798), (12, 1690665), (15, 1352532), (18, 1127110), (20, 1014399), (30, 676266), (36, 563555), (45, 450844), (60, 338133), (90, 225422), (180, 112711), (269, 75420), (419, 48420), (538, 37710), (807, 25140), (838, 24210), (1076, 18855), (1257, 16140), (1345, 15084), (1614, 12570), (1676, 12105), (2095, 9684), (2421, 8380), (2514, 8070), (2690, 7542), (3228, 6285), (3771, 5380), (4035, 5028), (4190, 4842)]