81311140

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{313}}^1\times {\mathrm{419}}^1$

素因数の和:772

約数の個数: 48

約数和(自身を含む): 177246720

約数和(自身を除く): 95935580

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 313, 419, 620, 626, 838, 1252, 1565, 1676, 2095, 3130, 4190, 6260, 8380, 9703, 12989, 19406, 25978, 38812, 48515, 51956, 64945, 97030, 129890, 131147, 194060, 259780, 262294, 524588, 655735, 1311470, 2622940, 4065557, 8131114, 16262228, 20327785, 40655570, 81311140]

約数ペア:

[(1, 81311140), (2, 40655570), (4, 20327785), (5, 16262228), (10, 8131114), (20, 4065557), (31, 2622940), (62, 1311470), (124, 655735), (155, 524588), (310, 262294), (313, 259780), (419, 194060), (620, 131147), (626, 129890), (838, 97030), (1252, 64945), (1565, 51956), (1676, 48515), (2095, 38812), (3130, 25978), (4190, 19406), (6260, 12989), (8380, 9703)]