19777725

素因数分解:

$3^2\times 5^2\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{131}}^1$

素因数の和:219

約数の個数: 72

約数和(自身を含む): 39577824

約数和(自身を除く): 19800099

約数列:

[1, 3, 5, 9, 11, 15, 25, 33, 45, 55, 61, 75, 99, 131, 165, 183, 225, 275, 305, 393, 495, 549, 655, 671, 825, 915, 1179, 1441, 1525, 1965, 2013, 2475, 2745, 3275, 3355, 4323, 4575, 5895, 6039, 7205, 7991, 9825, 10065, 12969, 13725, 16775, 21615, 23973, 29475, 30195, 36025, 39955, 50325, 64845, 71919, 87901, 108075, 119865, 150975, 199775, 263703, 324225, 359595, 439505, 599325, 791109, 1318515, 1797975, 2197525, 3955545, 6592575, 19777725]

約数ペア:

[(1, 19777725), (3, 6592575), (5, 3955545), (9, 2197525), (11, 1797975), (15, 1318515), (25, 791109), (33, 599325), (45, 439505), (55, 359595), (61, 324225), (75, 263703), (99, 199775), (131, 150975), (165, 119865), (183, 108075), (225, 87901), (275, 71919), (305, 64845), (393, 50325), (495, 39955), (549, 36025), (655, 30195), (671, 29475), (825, 23973), (915, 21615), (1179, 16775), (1441, 13725), (1525, 12969), (1965, 10065), (2013, 9825), (2475, 7991), (2745, 7205), (3275, 6039), (3355, 5895), (4323, 4575)]