21601720

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{179}}^1\times {\mathrm{431}}^1$

素因数の和:628

約数の個数: 64

約数和(自身を含む): 55987200

約数和(自身を除く): 34385480

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 179, 280, 358, 431, 716, 862, 895, 1253, 1432, 1724, 1790, 2155, 2506, 3017, 3448, 3580, 4310, 5012, 6034, 6265, 7160, 8620, 10024, 12068, 12530, 15085, 17240, 24136, 25060, 30170, 50120, 60340, 77149, 120680, 154298, 308596, 385745, 540043, 617192, 771490, 1080086, 1542980, 2160172, 2700215, 3085960, 4320344, 5400430, 10800860, 21601720]

約数ペア:

[(1, 21601720), (2, 10800860), (4, 5400430), (5, 4320344), (7, 3085960), (8, 2700215), (10, 2160172), (14, 1542980), (20, 1080086), (28, 771490), (35, 617192), (40, 540043), (56, 385745), (70, 308596), (140, 154298), (179, 120680), (280, 77149), (358, 60340), (431, 50120), (716, 30170), (862, 25060), (895, 24136), (1253, 17240), (1432, 15085), (1724, 12530), (1790, 12068), (2155, 10024), (2506, 8620), (3017, 7160), (3448, 6265), (3580, 6034), (4310, 5012)]