20520396

素因数分解:

$2^2\times 3^2\times {\mathrm{13}}^1\times {\mathrm{163}}^1\times {\mathrm{269}}^1$

素因数の和:455

約数の個数: 72

約数和(自身を含む): 56412720

約数和(自身を除く): 35892324

約数列:

[1, 2, 3, 4, 6, 9, 12, 13, 18, 26, 36, 39, 52, 78, 117, 156, 163, 234, 269, 326, 468, 489, 538, 652, 807, 978, 1076, 1467, 1614, 1956, 2119, 2421, 2934, 3228, 3497, 4238, 4842, 5868, 6357, 6994, 8476, 9684, 10491, 12714, 13988, 19071, 20982, 25428, 31473, 38142, 41964, 43847, 62946, 76284, 87694, 125892, 131541, 175388, 263082, 394623, 526164, 570011, 789246, 1140022, 1578492, 1710033, 2280044, 3420066, 5130099, 6840132, 10260198, 20520396]

約数ペア:

[(1, 20520396), (2, 10260198), (3, 6840132), (4, 5130099), (6, 3420066), (9, 2280044), (12, 1710033), (13, 1578492), (18, 1140022), (26, 789246), (36, 570011), (39, 526164), (52, 394623), (78, 263082), (117, 175388), (156, 131541), (163, 125892), (234, 87694), (269, 76284), (326, 62946), (468, 43847), (489, 41964), (538, 38142), (652, 31473), (807, 25428), (978, 20982), (1076, 19071), (1467, 13988), (1614, 12714), (1956, 10491), (2119, 9684), (2421, 8476), (2934, 6994), (3228, 6357), (3497, 5868), (4238, 4842)]