21980028

素因数分解:

$2^2\times 3^1\times 7^2\times {\mathrm{29}}^1\times {\mathrm{1289}}^1$

素因数の和:1339

約数の個数: 72

約数和(自身を含む): 61765200

約数和(自身を除く): 39785172

約数列:

[1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 29, 42, 49, 58, 84, 87, 98, 116, 147, 174, 196, 203, 294, 348, 406, 588, 609, 812, 1218, 1289, 1421, 2436, 2578, 2842, 3867, 4263, 5156, 5684, 7734, 8526, 9023, 15468, 17052, 18046, 27069, 36092, 37381, 54138, 63161, 74762, 108276, 112143, 126322, 149524, 189483, 224286, 252644, 261667, 378966, 448572, 523334, 757932, 785001, 1046668, 1570002, 1831669, 3140004, 3663338, 5495007, 7326676, 10990014, 21980028]

約数ペア:

[(1, 21980028), (2, 10990014), (3, 7326676), (4, 5495007), (6, 3663338), (7, 3140004), (12, 1831669), (14, 1570002), (21, 1046668), (28, 785001), (29, 757932), (42, 523334), (49, 448572), (58, 378966), (84, 261667), (87, 252644), (98, 224286), (116, 189483), (147, 149524), (174, 126322), (196, 112143), (203, 108276), (294, 74762), (348, 63161), (406, 54138), (588, 37381), (609, 36092), (812, 27069), (1218, 18046), (1289, 17052), (1421, 15468), (2436, 9023), (2578, 8526), (2842, 7734), (3867, 5684), (4263, 5156)]