647140

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{131}}^1$

素因数の和:172

約数の個数: 48

約数和(自身を含む): 1552320

約数和(自身を除く): 905180

約数列:

[1, 2, 4, 5, 10, 13, 19, 20, 26, 38, 52, 65, 76, 95, 130, 131, 190, 247, 260, 262, 380, 494, 524, 655, 988, 1235, 1310, 1703, 2470, 2489, 2620, 3406, 4940, 4978, 6812, 8515, 9956, 12445, 17030, 24890, 32357, 34060, 49780, 64714, 129428, 161785, 323570, 647140]

約数ペア:

[(1, 647140), (2, 323570), (4, 161785), (5, 129428), (10, 64714), (13, 49780), (19, 34060), (20, 32357), (26, 24890), (38, 17030), (52, 12445), (65, 9956), (76, 8515), (95, 6812), (130, 4978), (131, 4940), (190, 3406), (247, 2620), (260, 2489), (262, 2470), (380, 1703), (494, 1310), (524, 1235), (655, 988)]