20401600

素因数分解:

$2^6\times 5^2\times {\mathrm{41}}^1\times {\mathrm{311}}^1$

素因数の和:374

約数の個数: 84

約数和(自身を含む): 51590448

約数和(自身を除く): 31188848

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 41, 50, 64, 80, 82, 100, 160, 164, 200, 205, 311, 320, 328, 400, 410, 622, 656, 800, 820, 1025, 1244, 1312, 1555, 1600, 1640, 2050, 2488, 2624, 3110, 3280, 4100, 4976, 6220, 6560, 7775, 8200, 9952, 12440, 12751, 13120, 15550, 16400, 19904, 24880, 25502, 31100, 32800, 49760, 51004, 62200, 63755, 65600, 99520, 102008, 124400, 127510, 204016, 248800, 255020, 318775, 408032, 497600, 510040, 637550, 816064, 1020080, 1275100, 2040160, 2550200, 4080320, 5100400, 10200800, 20401600]

約数ペア:

[(1, 20401600), (2, 10200800), (4, 5100400), (5, 4080320), (8, 2550200), (10, 2040160), (16, 1275100), (20, 1020080), (25, 816064), (32, 637550), (40, 510040), (41, 497600), (50, 408032), (64, 318775), (80, 255020), (82, 248800), (100, 204016), (160, 127510), (164, 124400), (200, 102008), (205, 99520), (311, 65600), (320, 63755), (328, 62200), (400, 51004), (410, 49760), (622, 32800), (656, 31100), (800, 25502), (820, 24880), (1025, 19904), (1244, 16400), (1312, 15550), (1555, 13120), (1600, 12751), (1640, 12440), (2050, 9952), (2488, 8200), (2624, 7775), (3110, 6560), (3280, 6220), (4100, 4976)]