28397340

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{1997}}^1$

素因数の和:2091

約数の個数: 72

約数和(自身を含む): 87272640

約数和(自身を除く): 58875300

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 79, 90, 158, 180, 237, 316, 395, 474, 711, 790, 948, 1185, 1422, 1580, 1997, 2370, 2844, 3555, 3994, 4740, 5991, 7110, 7988, 9985, 11982, 14220, 17973, 19970, 23964, 29955, 35946, 39940, 59910, 71892, 89865, 119820, 157763, 179730, 315526, 359460, 473289, 631052, 788815, 946578, 1419867, 1577630, 1893156, 2366445, 2839734, 3155260, 4732890, 5679468, 7099335, 9465780, 14198670, 28397340]

約数ペア:

[(1, 28397340), (2, 14198670), (3, 9465780), (4, 7099335), (5, 5679468), (6, 4732890), (9, 3155260), (10, 2839734), (12, 2366445), (15, 1893156), (18, 1577630), (20, 1419867), (30, 946578), (36, 788815), (45, 631052), (60, 473289), (79, 359460), (90, 315526), (158, 179730), (180, 157763), (237, 119820), (316, 89865), (395, 71892), (474, 59910), (711, 39940), (790, 35946), (948, 29955), (1185, 23964), (1422, 19970), (1580, 17973), (1997, 14220), (2370, 11982), (2844, 9985), (3555, 7988), (3994, 7110), (4740, 5991)]