21088240

素因数分解:

$2^4\times 5^1\times {\mathrm{23}}^1\times {\mathrm{73}}^1\times {\mathrm{157}}^1$

素因数の和:266

約数の個数: 80

約数和(自身を含む): 52193088

約数和(自身を除く): 31104848

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 40, 46, 73, 80, 92, 115, 146, 157, 184, 230, 292, 314, 365, 368, 460, 584, 628, 730, 785, 920, 1168, 1256, 1460, 1570, 1679, 1840, 2512, 2920, 3140, 3358, 3611, 5840, 6280, 6716, 7222, 8395, 11461, 12560, 13432, 14444, 16790, 18055, 22922, 26864, 28888, 33580, 36110, 45844, 57305, 57776, 67160, 72220, 91688, 114610, 134320, 144440, 183376, 229220, 263603, 288880, 458440, 527206, 916880, 1054412, 1318015, 2108824, 2636030, 4217648, 5272060, 10544120, 21088240]

約数ペア:

[(1, 21088240), (2, 10544120), (4, 5272060), (5, 4217648), (8, 2636030), (10, 2108824), (16, 1318015), (20, 1054412), (23, 916880), (40, 527206), (46, 458440), (73, 288880), (80, 263603), (92, 229220), (115, 183376), (146, 144440), (157, 134320), (184, 114610), (230, 91688), (292, 72220), (314, 67160), (365, 57776), (368, 57305), (460, 45844), (584, 36110), (628, 33580), (730, 28888), (785, 26864), (920, 22922), (1168, 18055), (1256, 16790), (1460, 14444), (1570, 13432), (1679, 12560), (1840, 11461), (2512, 8395), (2920, 7222), (3140, 6716), (3358, 6280), (3611, 5840)]