20178080

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{109}}^1$

素因数の和:226

約数の個数: 96

約数和(自身を含む): 52390800

約数和(自身を除く): 32212720

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 65, 80, 89, 104, 109, 130, 160, 178, 208, 218, 260, 356, 416, 436, 445, 520, 545, 712, 872, 890, 1040, 1090, 1157, 1417, 1424, 1744, 1780, 2080, 2180, 2314, 2834, 2848, 3488, 3560, 4360, 4628, 5668, 5785, 7085, 7120, 8720, 9256, 9701, 11336, 11570, 14170, 14240, 17440, 18512, 19402, 22672, 23140, 28340, 37024, 38804, 45344, 46280, 48505, 56680, 77608, 92560, 97010, 113360, 126113, 155216, 185120, 194020, 226720, 252226, 310432, 388040, 504452, 630565, 776080, 1008904, 1261130, 1552160, 2017808, 2522260, 4035616, 5044520, 10089040, 20178080]

約数ペア:

[(1, 20178080), (2, 10089040), (4, 5044520), (5, 4035616), (8, 2522260), (10, 2017808), (13, 1552160), (16, 1261130), (20, 1008904), (26, 776080), (32, 630565), (40, 504452), (52, 388040), (65, 310432), (80, 252226), (89, 226720), (104, 194020), (109, 185120), (130, 155216), (160, 126113), (178, 113360), (208, 97010), (218, 92560), (260, 77608), (356, 56680), (416, 48505), (436, 46280), (445, 45344), (520, 38804), (545, 37024), (712, 28340), (872, 23140), (890, 22672), (1040, 19402), (1090, 18512), (1157, 17440), (1417, 14240), (1424, 14170), (1744, 11570), (1780, 11336), (2080, 9701), (2180, 9256), (2314, 8720), (2834, 7120), (2848, 7085), (3488, 5785), (3560, 5668), (4360, 4628)]