20657628

素因数分解:

$2^2\times 3^2\times {\mathrm{29}}^1\times {\mathrm{47}}^1\times {\mathrm{421}}^1$

素因数の和:507

約数の個数: 72

約数和(自身を含む): 55298880

約数和(自身を除く): 34641252

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 29, 36, 47, 58, 87, 94, 116, 141, 174, 188, 261, 282, 348, 421, 423, 522, 564, 842, 846, 1044, 1263, 1363, 1684, 1692, 2526, 2726, 3789, 4089, 5052, 5452, 7578, 8178, 12209, 12267, 15156, 16356, 19787, 24418, 24534, 36627, 39574, 48836, 49068, 59361, 73254, 79148, 109881, 118722, 146508, 178083, 219762, 237444, 356166, 439524, 573823, 712332, 1147646, 1721469, 2295292, 3442938, 5164407, 6885876, 10328814, 20657628]

約数ペア:

[(1, 20657628), (2, 10328814), (3, 6885876), (4, 5164407), (6, 3442938), (9, 2295292), (12, 1721469), (18, 1147646), (29, 712332), (36, 573823), (47, 439524), (58, 356166), (87, 237444), (94, 219762), (116, 178083), (141, 146508), (174, 118722), (188, 109881), (261, 79148), (282, 73254), (348, 59361), (421, 49068), (423, 48836), (522, 39574), (564, 36627), (842, 24534), (846, 24418), (1044, 19787), (1263, 16356), (1363, 15156), (1684, 12267), (1692, 12209), (2526, 8178), (2726, 7578), (3789, 5452), (4089, 5052)]