20543440

素因数分解:

$2^4\times 5^1\times {\mathrm{491}}^1\times {\mathrm{523}}^1$

素因数の和:1027

約数の個数: 40

約数和(自身を含む): 47952288

約数和(自身を除く): 27408848

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 491, 523, 982, 1046, 1964, 2092, 2455, 2615, 3928, 4184, 4910, 5230, 7856, 8368, 9820, 10460, 19640, 20920, 39280, 41840, 256793, 513586, 1027172, 1283965, 2054344, 2567930, 4108688, 5135860, 10271720, 20543440]

約数ペア:

[(1, 20543440), (2, 10271720), (4, 5135860), (5, 4108688), (8, 2567930), (10, 2054344), (16, 1283965), (20, 1027172), (40, 513586), (80, 256793), (491, 41840), (523, 39280), (982, 20920), (1046, 19640), (1964, 10460), (2092, 9820), (2455, 8368), (2615, 7856), (3928, 5230), (4184, 4910)]