21705720

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{277}}^1\times {\mathrm{653}}^1$

素因数の和:944

約数の個数: 64

約数和(自身を含む): 65452320

約数和(自身を除く): 43746600

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120, 277, 554, 653, 831, 1108, 1306, 1385, 1662, 1959, 2216, 2612, 2770, 3265, 3324, 3918, 4155, 5224, 5540, 6530, 6648, 7836, 8310, 9795, 11080, 13060, 15672, 16620, 19590, 26120, 33240, 39180, 78360, 180881, 361762, 542643, 723524, 904405, 1085286, 1447048, 1808810, 2170572, 2713215, 3617620, 4341144, 5426430, 7235240, 10852860, 21705720]

約数ペア:

[(1, 21705720), (2, 10852860), (3, 7235240), (4, 5426430), (5, 4341144), (6, 3617620), (8, 2713215), (10, 2170572), (12, 1808810), (15, 1447048), (20, 1085286), (24, 904405), (30, 723524), (40, 542643), (60, 361762), (120, 180881), (277, 78360), (554, 39180), (653, 33240), (831, 26120), (1108, 19590), (1306, 16620), (1385, 15672), (1662, 13060), (1959, 11080), (2216, 9795), (2612, 8310), (2770, 7836), (3265, 6648), (3324, 6530), (3918, 5540), (4155, 5224)]