81205460

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{211}}^1\times {\mathrm{2749}}^1$

素因数の和:2976

約数の個数: 48

約数和(自身を含む): 195888000

約数和(自身を除く): 114682540

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 211, 422, 844, 1055, 1477, 2110, 2749, 2954, 4220, 5498, 5908, 7385, 10996, 13745, 14770, 19243, 27490, 29540, 38486, 54980, 76972, 96215, 192430, 384860, 580039, 1160078, 2320156, 2900195, 4060273, 5800390, 8120546, 11600780, 16241092, 20301365, 40602730, 81205460]

約数ペア:

[(1, 81205460), (2, 40602730), (4, 20301365), (5, 16241092), (7, 11600780), (10, 8120546), (14, 5800390), (20, 4060273), (28, 2900195), (35, 2320156), (70, 1160078), (140, 580039), (211, 384860), (422, 192430), (844, 96215), (1055, 76972), (1477, 54980), (2110, 38486), (2749, 29540), (2954, 27490), (4220, 19243), (5498, 14770), (5908, 13745), (7385, 10996)]