20945808

素因数分解:

$2^4\times 3^2\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{167}}^1$

素因数の和:261

約数の個数: 120

約数和(自身を含む): 64454208

約数和(自身を除く): 43508400

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 13, 16, 18, 24, 26, 36, 39, 48, 52, 67, 72, 78, 104, 117, 134, 144, 156, 167, 201, 208, 234, 268, 312, 334, 402, 468, 501, 536, 603, 624, 668, 804, 871, 936, 1002, 1072, 1206, 1336, 1503, 1608, 1742, 1872, 2004, 2171, 2412, 2613, 2672, 3006, 3216, 3484, 4008, 4342, 4824, 5226, 6012, 6513, 6968, 7839, 8016, 8684, 9648, 10452, 11189, 12024, 13026, 13936, 15678, 17368, 19539, 20904, 22378, 24048, 26052, 31356, 33567, 34736, 39078, 41808, 44756, 52104, 62712, 67134, 78156, 89512, 100701, 104208, 125424, 134268, 145457, 156312, 179024, 201402, 268536, 290914, 312624, 402804, 436371, 537072, 581828, 805608, 872742, 1163656, 1309113, 1611216, 1745484, 2327312, 2618226, 3490968, 5236452, 6981936, 10472904, 20945808]

約数ペア:

[(1, 20945808), (2, 10472904), (3, 6981936), (4, 5236452), (6, 3490968), (8, 2618226), (9, 2327312), (12, 1745484), (13, 1611216), (16, 1309113), (18, 1163656), (24, 872742), (26, 805608), (36, 581828), (39, 537072), (48, 436371), (52, 402804), (67, 312624), (72, 290914), (78, 268536), (104, 201402), (117, 179024), (134, 156312), (144, 145457), (156, 134268), (167, 125424), (201, 104208), (208, 100701), (234, 89512), (268, 78156), (312, 67134), (334, 62712), (402, 52104), (468, 44756), (501, 41808), (536, 39078), (603, 34736), (624, 33567), (668, 31356), (804, 26052), (871, 24048), (936, 22378), (1002, 20904), (1072, 19539), (1206, 17368), (1336, 15678), (1503, 13936), (1608, 13026), (1742, 12024), (1872, 11189), (2004, 10452), (2171, 9648), (2412, 8684), (2613, 8016), (2672, 7839), (3006, 6968), (3216, 6513), (3484, 6012), (4008, 5226), (4342, 4824)]