20811960

素因数分解:

$2^3\times 3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{4447}}^1$

素因数の和:4477

約数の個数: 96

約数和(自身を含む): 72858240

約数和(自身を除く): 52046280

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 13, 15, 18, 20, 24, 26, 30, 36, 39, 40, 45, 52, 60, 65, 72, 78, 90, 104, 117, 120, 130, 156, 180, 195, 234, 260, 312, 360, 390, 468, 520, 585, 780, 936, 1170, 1560, 2340, 4447, 4680, 8894, 13341, 17788, 22235, 26682, 35576, 40023, 44470, 53364, 57811, 66705, 80046, 88940, 106728, 115622, 133410, 160092, 173433, 177880, 200115, 231244, 266820, 289055, 320184, 346866, 400230, 462488, 520299, 533640, 578110, 693732, 800460, 867165, 1040598, 1156220, 1387464, 1600920, 1734330, 2081196, 2312440, 2601495, 3468660, 4162392, 5202990, 6937320, 10405980, 20811960]

約数ペア:

[(1, 20811960), (2, 10405980), (3, 6937320), (4, 5202990), (5, 4162392), (6, 3468660), (8, 2601495), (9, 2312440), (10, 2081196), (12, 1734330), (13, 1600920), (15, 1387464), (18, 1156220), (20, 1040598), (24, 867165), (26, 800460), (30, 693732), (36, 578110), (39, 533640), (40, 520299), (45, 462488), (52, 400230), (60, 346866), (65, 320184), (72, 289055), (78, 266820), (90, 231244), (104, 200115), (117, 177880), (120, 173433), (130, 160092), (156, 133410), (180, 115622), (195, 106728), (234, 88940), (260, 80046), (312, 66705), (360, 57811), (390, 53364), (468, 44470), (520, 40023), (585, 35576), (780, 26682), (936, 22235), (1170, 17788), (1560, 13341), (2340, 8894), (4447, 4680)]