20801625

素因数分解:

$3^1\times 5^3\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{251}}^1$

素因数の和:299

約数の個数: 64

約数和(自身を含む): 39626496

約数和(自身を除く): 18824871

約数列:

[1, 3, 5, 13, 15, 17, 25, 39, 51, 65, 75, 85, 125, 195, 221, 251, 255, 325, 375, 425, 663, 753, 975, 1105, 1255, 1275, 1625, 2125, 3263, 3315, 3765, 4267, 4875, 5525, 6275, 6375, 9789, 12801, 16315, 16575, 18825, 21335, 27625, 31375, 48945, 55471, 64005, 81575, 82875, 94125, 106675, 166413, 244725, 277355, 320025, 407875, 533375, 832065, 1223625, 1386775, 1600125, 4160325, 6933875, 20801625]

約数ペア:

[(1, 20801625), (3, 6933875), (5, 4160325), (13, 1600125), (15, 1386775), (17, 1223625), (25, 832065), (39, 533375), (51, 407875), (65, 320025), (75, 277355), (85, 244725), (125, 166413), (195, 106675), (221, 94125), (251, 82875), (255, 81575), (325, 64005), (375, 55471), (425, 48945), (663, 31375), (753, 27625), (975, 21335), (1105, 18825), (1255, 16575), (1275, 16315), (1625, 12801), (2125, 9789), (3263, 6375), (3315, 6275), (3765, 5525), (4267, 4875)]