20021920

素因数分解:

$2^5\times 5^1\times {\mathrm{17}}^2\times {\mathrm{433}}^1$

素因数の和:482

約数の個数: 72

約数和(自身を含む): 50363964

約数和(自身を除く): 30342044

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 40, 68, 80, 85, 136, 160, 170, 272, 289, 340, 433, 544, 578, 680, 866, 1156, 1360, 1445, 1732, 2165, 2312, 2720, 2890, 3464, 4330, 4624, 5780, 6928, 7361, 8660, 9248, 11560, 13856, 14722, 17320, 23120, 29444, 34640, 36805, 46240, 58888, 69280, 73610, 117776, 125137, 147220, 235552, 250274, 294440, 500548, 588880, 625685, 1001096, 1177760, 1251370, 2002192, 2502740, 4004384, 5005480, 10010960, 20021920]

約数ペア:

[(1, 20021920), (2, 10010960), (4, 5005480), (5, 4004384), (8, 2502740), (10, 2002192), (16, 1251370), (17, 1177760), (20, 1001096), (32, 625685), (34, 588880), (40, 500548), (68, 294440), (80, 250274), (85, 235552), (136, 147220), (160, 125137), (170, 117776), (272, 73610), (289, 69280), (340, 58888), (433, 46240), (544, 36805), (578, 34640), (680, 29444), (866, 23120), (1156, 17320), (1360, 14722), (1445, 13856), (1732, 11560), (2165, 9248), (2312, 8660), (2720, 7361), (2890, 6928), (3464, 5780), (4330, 4624)]