20551880

素因数分解:

$2^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{89}}^1\times {\mathrm{251}}^1$

素因数の和:374

約数の個数: 64

約数和(自身を含む): 48988800

約数和(自身を除く): 28436920

約数列:

[1, 2, 4, 5, 8, 10, 20, 23, 40, 46, 89, 92, 115, 178, 184, 230, 251, 356, 445, 460, 502, 712, 890, 920, 1004, 1255, 1780, 2008, 2047, 2510, 3560, 4094, 5020, 5773, 8188, 10040, 10235, 11546, 16376, 20470, 22339, 23092, 28865, 40940, 44678, 46184, 57730, 81880, 89356, 111695, 115460, 178712, 223390, 230920, 446780, 513797, 893560, 1027594, 2055188, 2568985, 4110376, 5137970, 10275940, 20551880]

約数ペア:

[(1, 20551880), (2, 10275940), (4, 5137970), (5, 4110376), (8, 2568985), (10, 2055188), (20, 1027594), (23, 893560), (40, 513797), (46, 446780), (89, 230920), (92, 223390), (115, 178712), (178, 115460), (184, 111695), (230, 89356), (251, 81880), (356, 57730), (445, 46184), (460, 44678), (502, 40940), (712, 28865), (890, 23092), (920, 22339), (1004, 20470), (1255, 16376), (1780, 11546), (2008, 10235), (2047, 10040), (2510, 8188), (3560, 5773), (4094, 5020)]