19811020

素因数分解:

$2^2\times 5^1\times {\mathrm{59}}^1\times {\mathrm{103}}^1\times {\mathrm{163}}^1$

素因数の和:334

約数の個数: 48

約数和(自身を含む): 42981120

約数和(自身を除く): 23170100

約数列:

[1, 2, 4, 5, 10, 20, 59, 103, 118, 163, 206, 236, 295, 326, 412, 515, 590, 652, 815, 1030, 1180, 1630, 2060, 3260, 6077, 9617, 12154, 16789, 19234, 24308, 30385, 33578, 38468, 48085, 60770, 67156, 83945, 96170, 121540, 167890, 192340, 335780, 990551, 1981102, 3962204, 4952755, 9905510, 19811020]

約数ペア:

[(1, 19811020), (2, 9905510), (4, 4952755), (5, 3962204), (10, 1981102), (20, 990551), (59, 335780), (103, 192340), (118, 167890), (163, 121540), (206, 96170), (236, 83945), (295, 67156), (326, 60770), (412, 48085), (515, 38468), (590, 33578), (652, 30385), (815, 24308), (1030, 19234), (1180, 16789), (1630, 12154), (2060, 9617), (3260, 6077)]