21851955

素因数分解:

$3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{491}}^1$

素因数の和:568

約数の個数: 48

約数和(自身を含む): 40525056

約数和(自身を除く): 18673101

約数列:

[1, 3, 5, 9, 15, 23, 43, 45, 69, 115, 129, 207, 215, 345, 387, 491, 645, 989, 1035, 1473, 1935, 2455, 2967, 4419, 4945, 7365, 8901, 11293, 14835, 21113, 22095, 33879, 44505, 56465, 63339, 101637, 105565, 169395, 190017, 316695, 485599, 508185, 950085, 1456797, 2427995, 4370391, 7283985, 21851955]

約数ペア:

[(1, 21851955), (3, 7283985), (5, 4370391), (9, 2427995), (15, 1456797), (23, 950085), (43, 508185), (45, 485599), (69, 316695), (115, 190017), (129, 169395), (207, 105565), (215, 101637), (345, 63339), (387, 56465), (491, 44505), (645, 33879), (989, 22095), (1035, 21113), (1473, 14835), (1935, 11293), (2455, 8901), (2967, 7365), (4419, 4945)]