19687990

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{113}}^1\times {\mathrm{131}}^1$

素因数の和:277

約数の個数: 64

約数和(自身を含む): 43338240

約数和(自身を除く): 23650250

約数列:

[1, 2, 5, 7, 10, 14, 19, 35, 38, 70, 95, 113, 131, 133, 190, 226, 262, 266, 565, 655, 665, 791, 917, 1130, 1310, 1330, 1582, 1834, 2147, 2489, 3955, 4294, 4585, 4978, 7910, 9170, 10735, 12445, 14803, 15029, 17423, 21470, 24890, 29606, 30058, 34846, 74015, 75145, 87115, 103621, 148030, 150290, 174230, 207242, 281257, 518105, 562514, 1036210, 1406285, 1968799, 2812570, 3937598, 9843995, 19687990]

約数ペア:

[(1, 19687990), (2, 9843995), (5, 3937598), (7, 2812570), (10, 1968799), (14, 1406285), (19, 1036210), (35, 562514), (38, 518105), (70, 281257), (95, 207242), (113, 174230), (131, 150290), (133, 148030), (190, 103621), (226, 87115), (262, 75145), (266, 74015), (565, 34846), (655, 30058), (665, 29606), (791, 24890), (917, 21470), (1130, 17423), (1310, 15029), (1330, 14803), (1582, 12445), (1834, 10735), (2147, 9170), (2489, 7910), (3955, 4978), (4294, 4585)]