20308720

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{431}}^1$

素因数の和:494

約数の個数: 80

約数和(自身を含む): 51425280

約数和(自身を除く): 31116560

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 31, 38, 40, 62, 76, 80, 95, 124, 152, 155, 190, 248, 304, 310, 380, 431, 496, 589, 620, 760, 862, 1178, 1240, 1520, 1724, 2155, 2356, 2480, 2945, 3448, 4310, 4712, 5890, 6896, 8189, 8620, 9424, 11780, 13361, 16378, 17240, 23560, 26722, 32756, 34480, 40945, 47120, 53444, 65512, 66805, 81890, 106888, 131024, 133610, 163780, 213776, 253859, 267220, 327560, 507718, 534440, 655120, 1015436, 1068880, 1269295, 2030872, 2538590, 4061744, 5077180, 10154360, 20308720]

約数ペア:

[(1, 20308720), (2, 10154360), (4, 5077180), (5, 4061744), (8, 2538590), (10, 2030872), (16, 1269295), (19, 1068880), (20, 1015436), (31, 655120), (38, 534440), (40, 507718), (62, 327560), (76, 267220), (80, 253859), (95, 213776), (124, 163780), (152, 133610), (155, 131024), (190, 106888), (248, 81890), (304, 66805), (310, 65512), (380, 53444), (431, 47120), (496, 40945), (589, 34480), (620, 32756), (760, 26722), (862, 23560), (1178, 17240), (1240, 16378), (1520, 13361), (1724, 11780), (2155, 9424), (2356, 8620), (2480, 8189), (2945, 6896), (3448, 5890), (4310, 4712)]