21371960

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{461}}^1$

素因数の和:552

約数の個数: 64

約数和(自身を含む): 51559200

約数和(自身を除く): 30187240

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 61, 76, 95, 122, 152, 190, 244, 305, 380, 461, 488, 610, 760, 922, 1159, 1220, 1844, 2305, 2318, 2440, 3688, 4610, 4636, 5795, 8759, 9220, 9272, 11590, 17518, 18440, 23180, 28121, 35036, 43795, 46360, 56242, 70072, 87590, 112484, 140605, 175180, 224968, 281210, 350360, 534299, 562420, 1068598, 1124840, 2137196, 2671495, 4274392, 5342990, 10685980, 21371960]

約数ペア:

[(1, 21371960), (2, 10685980), (4, 5342990), (5, 4274392), (8, 2671495), (10, 2137196), (19, 1124840), (20, 1068598), (38, 562420), (40, 534299), (61, 350360), (76, 281210), (95, 224968), (122, 175180), (152, 140605), (190, 112484), (244, 87590), (305, 70072), (380, 56242), (461, 46360), (488, 43795), (610, 35036), (760, 28121), (922, 23180), (1159, 18440), (1220, 17518), (1844, 11590), (2305, 9272), (2318, 9220), (2440, 8759), (3688, 5795), (4610, 4636)]