20020910

素因数分解:

$2^1\times 5^1\times 7^3\times {\mathrm{13}}^1\times {\mathrm{449}}^1$

素因数の和:490

約数の個数: 64

約数和(自身を含む): 45360000

約数和(自身を除く): 25339090

約数列:

[1, 2, 5, 7, 10, 13, 14, 26, 35, 49, 65, 70, 91, 98, 130, 182, 245, 343, 449, 455, 490, 637, 686, 898, 910, 1274, 1715, 2245, 3143, 3185, 3430, 4459, 4490, 5837, 6286, 6370, 8918, 11674, 15715, 22001, 22295, 29185, 31430, 40859, 44002, 44590, 58370, 81718, 110005, 154007, 204295, 220010, 286013, 308014, 408590, 572026, 770035, 1430065, 1540070, 2002091, 2860130, 4004182, 10010455, 20020910]

約数ペア:

[(1, 20020910), (2, 10010455), (5, 4004182), (7, 2860130), (10, 2002091), (13, 1540070), (14, 1430065), (26, 770035), (35, 572026), (49, 408590), (65, 308014), (70, 286013), (91, 220010), (98, 204295), (130, 154007), (182, 110005), (245, 81718), (343, 58370), (449, 44590), (455, 44002), (490, 40859), (637, 31430), (686, 29185), (898, 22295), (910, 22001), (1274, 15715), (1715, 11674), (2245, 8918), (3143, 6370), (3185, 6286), (3430, 5837), (4459, 4490)]