21001760

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{439}}^1$

素因数の和:490

約数の個数: 96

約数和(自身を含む): 55883520

約数和(自身を除く): 34881760

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 23, 26, 32, 40, 46, 52, 65, 80, 92, 104, 115, 130, 160, 184, 208, 230, 260, 299, 368, 416, 439, 460, 520, 598, 736, 878, 920, 1040, 1196, 1495, 1756, 1840, 2080, 2195, 2392, 2990, 3512, 3680, 4390, 4784, 5707, 5980, 7024, 8780, 9568, 10097, 11414, 11960, 14048, 17560, 20194, 22828, 23920, 28535, 35120, 40388, 45656, 47840, 50485, 57070, 70240, 80776, 91312, 100970, 114140, 131261, 161552, 182624, 201940, 228280, 262522, 323104, 403880, 456560, 525044, 656305, 807760, 913120, 1050088, 1312610, 1615520, 2100176, 2625220, 4200352, 5250440, 10500880, 21001760]

約数ペア:

[(1, 21001760), (2, 10500880), (4, 5250440), (5, 4200352), (8, 2625220), (10, 2100176), (13, 1615520), (16, 1312610), (20, 1050088), (23, 913120), (26, 807760), (32, 656305), (40, 525044), (46, 456560), (52, 403880), (65, 323104), (80, 262522), (92, 228280), (104, 201940), (115, 182624), (130, 161552), (160, 131261), (184, 114140), (208, 100970), (230, 91312), (260, 80776), (299, 70240), (368, 57070), (416, 50485), (439, 47840), (460, 45656), (520, 40388), (598, 35120), (736, 28535), (878, 23920), (920, 22828), (1040, 20194), (1196, 17560), (1495, 14048), (1756, 11960), (1840, 11414), (2080, 10097), (2195, 9568), (2392, 8780), (2990, 7024), (3512, 5980), (3680, 5707), (4390, 4784)]