20121850

素因数分解:

$2^1\times 5^2\times 7^2\times {\mathrm{43}}^1\times {\mathrm{191}}^1$

素因数の和:260

約数の個数: 72

約数和(自身を含む): 44782848

約数和(自身を除く): 24660998

約数列:

[1, 2, 5, 7, 10, 14, 25, 35, 43, 49, 50, 70, 86, 98, 175, 191, 215, 245, 301, 350, 382, 430, 490, 602, 955, 1075, 1225, 1337, 1505, 1910, 2107, 2150, 2450, 2674, 3010, 4214, 4775, 6685, 7525, 8213, 9359, 9550, 10535, 13370, 15050, 16426, 18718, 21070, 33425, 41065, 46795, 52675, 57491, 66850, 82130, 93590, 105350, 114982, 205325, 233975, 287455, 402437, 410650, 467950, 574910, 804874, 1437275, 2012185, 2874550, 4024370, 10060925, 20121850]

約数ペア:

[(1, 20121850), (2, 10060925), (5, 4024370), (7, 2874550), (10, 2012185), (14, 1437275), (25, 804874), (35, 574910), (43, 467950), (49, 410650), (50, 402437), (70, 287455), (86, 233975), (98, 205325), (175, 114982), (191, 105350), (215, 93590), (245, 82130), (301, 66850), (350, 57491), (382, 52675), (430, 46795), (490, 41065), (602, 33425), (955, 21070), (1075, 18718), (1225, 16426), (1337, 15050), (1505, 13370), (1910, 10535), (2107, 9550), (2150, 9359), (2450, 8213), (2674, 7525), (3010, 6685), (4214, 4775)]