20902140

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{53}}^1\times {\mathrm{313}}^1$

素因数の和:388

約数の個数: 144

約数和(自身を含む): 74063808

約数和(自身を除く): 53161668

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 53, 60, 63, 70, 84, 90, 105, 106, 126, 140, 159, 180, 210, 212, 252, 265, 313, 315, 318, 371, 420, 477, 530, 626, 630, 636, 742, 795, 939, 954, 1060, 1113, 1252, 1260, 1484, 1565, 1590, 1855, 1878, 1908, 2191, 2226, 2385, 2817, 3130, 3180, 3339, 3710, 3756, 4382, 4452, 4695, 4770, 5565, 5634, 6260, 6573, 6678, 7420, 8764, 9390, 9540, 10955, 11130, 11268, 13146, 13356, 14085, 16589, 16695, 18780, 19719, 21910, 22260, 26292, 28170, 32865, 33178, 33390, 39438, 43820, 49767, 56340, 65730, 66356, 66780, 78876, 82945, 98595, 99534, 116123, 131460, 149301, 165890, 197190, 199068, 232246, 248835, 298602, 331780, 348369, 394380, 464492, 497670, 580615, 597204, 696738, 746505, 995340, 1045107, 1161230, 1393476, 1493010, 1741845, 2090214, 2322460, 2986020, 3483690, 4180428, 5225535, 6967380, 10451070, 20902140]

約数ペア:

[(1, 20902140), (2, 10451070), (3, 6967380), (4, 5225535), (5, 4180428), (6, 3483690), (7, 2986020), (9, 2322460), (10, 2090214), (12, 1741845), (14, 1493010), (15, 1393476), (18, 1161230), (20, 1045107), (21, 995340), (28, 746505), (30, 696738), (35, 597204), (36, 580615), (42, 497670), (45, 464492), (53, 394380), (60, 348369), (63, 331780), (70, 298602), (84, 248835), (90, 232246), (105, 199068), (106, 197190), (126, 165890), (140, 149301), (159, 131460), (180, 116123), (210, 99534), (212, 98595), (252, 82945), (265, 78876), (313, 66780), (315, 66356), (318, 65730), (371, 56340), (420, 49767), (477, 43820), (530, 39438), (626, 33390), (630, 33178), (636, 32865), (742, 28170), (795, 26292), (939, 22260), (954, 21910), (1060, 19719), (1113, 18780), (1252, 16695), (1260, 16589), (1484, 14085), (1565, 13356), (1590, 13146), (1855, 11268), (1878, 11130), (1908, 10955), (2191, 9540), (2226, 9390), (2385, 8764), (2817, 7420), (3130, 6678), (3180, 6573), (3339, 6260), (3710, 5634), (3756, 5565), (4382, 4770), (4452, 4695)]