18656404

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{821}}^1$

素因数の和:880

約数の個数: 48

約数和(自身を含む): 38666880

約数和(自身を除く): 20010476

約数列:

[1, 2, 4, 13, 19, 23, 26, 38, 46, 52, 76, 92, 247, 299, 437, 494, 598, 821, 874, 988, 1196, 1642, 1748, 3284, 5681, 10673, 11362, 15599, 18883, 21346, 22724, 31198, 37766, 42692, 62396, 75532, 202787, 245479, 358777, 405574, 490958, 717554, 811148, 981916, 1435108, 4664101, 9328202, 18656404]

約数ペア:

[(1, 18656404), (2, 9328202), (4, 4664101), (13, 1435108), (19, 981916), (23, 811148), (26, 717554), (38, 490958), (46, 405574), (52, 358777), (76, 245479), (92, 202787), (247, 75532), (299, 62396), (437, 42692), (494, 37766), (598, 31198), (821, 22724), (874, 21346), (988, 18883), (1196, 15599), (1642, 11362), (1748, 10673), (3284, 5681)]