21520680

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{37}}^2\times {\mathrm{131}}^1$

素因数の和:219

約数の個数: 96

約数和(自身を含む): 66860640

約数和(自身を除く): 45339960

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 37, 40, 60, 74, 111, 120, 131, 148, 185, 222, 262, 296, 370, 393, 444, 524, 555, 655, 740, 786, 888, 1048, 1110, 1310, 1369, 1480, 1572, 1965, 2220, 2620, 2738, 3144, 3930, 4107, 4440, 4847, 5240, 5476, 6845, 7860, 8214, 9694, 10952, 13690, 14541, 15720, 16428, 19388, 20535, 24235, 27380, 29082, 32856, 38776, 41070, 48470, 54760, 58164, 72705, 82140, 96940, 116328, 145410, 164280, 179339, 193880, 290820, 358678, 538017, 581640, 717356, 896695, 1076034, 1434712, 1793390, 2152068, 2690085, 3586780, 4304136, 5380170, 7173560, 10760340, 21520680]

約数ペア:

[(1, 21520680), (2, 10760340), (3, 7173560), (4, 5380170), (5, 4304136), (6, 3586780), (8, 2690085), (10, 2152068), (12, 1793390), (15, 1434712), (20, 1076034), (24, 896695), (30, 717356), (37, 581640), (40, 538017), (60, 358678), (74, 290820), (111, 193880), (120, 179339), (131, 164280), (148, 145410), (185, 116328), (222, 96940), (262, 82140), (296, 72705), (370, 58164), (393, 54760), (444, 48470), (524, 41070), (555, 38776), (655, 32856), (740, 29082), (786, 27380), (888, 24235), (1048, 20535), (1110, 19388), (1310, 16428), (1369, 15720), (1480, 14541), (1572, 13690), (1965, 10952), (2220, 9694), (2620, 8214), (2738, 7860), (3144, 6845), (3930, 5476), (4107, 5240), (4440, 4847)]