19841984

素因数分解:

$2^6\times {\mathrm{31}}^1\times {\mathrm{73}}^1\times {\mathrm{137}}^1$

素因数の和:253

約数の個数: 56

約数和(自身を含む): 41501568

約数和(自身を除く): 21659584

約数列:

[1, 2, 4, 8, 16, 31, 32, 62, 64, 73, 124, 137, 146, 248, 274, 292, 496, 548, 584, 992, 1096, 1168, 1984, 2192, 2263, 2336, 4247, 4384, 4526, 4672, 8494, 8768, 9052, 10001, 16988, 18104, 20002, 33976, 36208, 40004, 67952, 72416, 80008, 135904, 144832, 160016, 271808, 310031, 320032, 620062, 640064, 1240124, 2480248, 4960496, 9920992, 19841984]

約数ペア:

[(1, 19841984), (2, 9920992), (4, 4960496), (8, 2480248), (16, 1240124), (31, 640064), (32, 620062), (62, 320032), (64, 310031), (73, 271808), (124, 160016), (137, 144832), (146, 135904), (248, 80008), (274, 72416), (292, 67952), (496, 40004), (548, 36208), (584, 33976), (992, 20002), (1096, 18104), (1168, 16988), (1984, 10001), (2192, 9052), (2263, 8768), (2336, 8494), (4247, 4672), (4384, 4526)]