21538552

素因数分解:

$2^3\times 7^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{653}}^1$

素因数の和:716

約数の個数: 64

約数和(自身を含む): 50227200

約数和(自身を除く): 28688648

約数列:

[1, 2, 4, 7, 8, 14, 19, 28, 31, 38, 56, 62, 76, 124, 133, 152, 217, 248, 266, 434, 532, 589, 653, 868, 1064, 1178, 1306, 1736, 2356, 2612, 4123, 4571, 4712, 5224, 8246, 9142, 12407, 16492, 18284, 20243, 24814, 32984, 36568, 40486, 49628, 80972, 86849, 99256, 141701, 161944, 173698, 283402, 347396, 384617, 566804, 694792, 769234, 1133608, 1538468, 2692319, 3076936, 5384638, 10769276, 21538552]

約数ペア:

[(1, 21538552), (2, 10769276), (4, 5384638), (7, 3076936), (8, 2692319), (14, 1538468), (19, 1133608), (28, 769234), (31, 694792), (38, 566804), (56, 384617), (62, 347396), (76, 283402), (124, 173698), (133, 161944), (152, 141701), (217, 99256), (248, 86849), (266, 80972), (434, 49628), (532, 40486), (589, 36568), (653, 32984), (868, 24814), (1064, 20243), (1178, 18284), (1306, 16492), (1736, 12407), (2356, 9142), (2612, 8246), (4123, 5224), (4571, 4712)]