21339680

素因数分解:

$2^5\times 5^1\times {\mathrm{41}}^1\times {\mathrm{3253}}^1$

素因数の和:3309

約数の個数: 48

約数和(自身を含む): 51660504

約数和(自身を除く): 30320824

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 41, 80, 82, 160, 164, 205, 328, 410, 656, 820, 1312, 1640, 3253, 3280, 6506, 6560, 13012, 16265, 26024, 32530, 52048, 65060, 104096, 130120, 133373, 260240, 266746, 520480, 533492, 666865, 1066984, 1333730, 2133968, 2667460, 4267936, 5334920, 10669840, 21339680]

約数ペア:

[(1, 21339680), (2, 10669840), (4, 5334920), (5, 4267936), (8, 2667460), (10, 2133968), (16, 1333730), (20, 1066984), (32, 666865), (40, 533492), (41, 520480), (80, 266746), (82, 260240), (160, 133373), (164, 130120), (205, 104096), (328, 65060), (410, 52048), (656, 32530), (820, 26024), (1312, 16265), (1640, 13012), (3253, 6560), (3280, 6506)]