20445880

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{137}}^1$

素因数の和:209

約数の個数: 128

約数和(自身を含む): 58423680

約数和(自身を除く): 37977800

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 20, 26, 28, 35, 40, 41, 52, 56, 65, 70, 82, 91, 104, 130, 137, 140, 164, 182, 205, 260, 274, 280, 287, 328, 364, 410, 455, 520, 533, 548, 574, 685, 728, 820, 910, 959, 1066, 1096, 1148, 1370, 1435, 1640, 1781, 1820, 1918, 2132, 2296, 2665, 2740, 2870, 3562, 3640, 3731, 3836, 4264, 4795, 5330, 5480, 5617, 5740, 7124, 7462, 7672, 8905, 9590, 10660, 11234, 11480, 12467, 14248, 14924, 17810, 18655, 19180, 21320, 22468, 24934, 28085, 29848, 35620, 37310, 38360, 39319, 44936, 49868, 56170, 62335, 71240, 73021, 74620, 78638, 99736, 112340, 124670, 146042, 149240, 157276, 196595, 224680, 249340, 292084, 314552, 365105, 393190, 498680, 511147, 584168, 730210, 786380, 1022294, 1460420, 1572760, 2044588, 2555735, 2920840, 4089176, 5111470, 10222940, 20445880]

約数ペア:

[(1, 20445880), (2, 10222940), (4, 5111470), (5, 4089176), (7, 2920840), (8, 2555735), (10, 2044588), (13, 1572760), (14, 1460420), (20, 1022294), (26, 786380), (28, 730210), (35, 584168), (40, 511147), (41, 498680), (52, 393190), (56, 365105), (65, 314552), (70, 292084), (82, 249340), (91, 224680), (104, 196595), (130, 157276), (137, 149240), (140, 146042), (164, 124670), (182, 112340), (205, 99736), (260, 78638), (274, 74620), (280, 73021), (287, 71240), (328, 62335), (364, 56170), (410, 49868), (455, 44936), (520, 39319), (533, 38360), (548, 37310), (574, 35620), (685, 29848), (728, 28085), (820, 24934), (910, 22468), (959, 21320), (1066, 19180), (1096, 18655), (1148, 17810), (1370, 14924), (1435, 14248), (1640, 12467), (1781, 11480), (1820, 11234), (1918, 10660), (2132, 9590), (2296, 8905), (2665, 7672), (2740, 7462), (2870, 7124), (3562, 5740), (3640, 5617), (3731, 5480), (3836, 5330), (4264, 4795)]