28121775

素因数分解:

$3^1\times 5^2\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{383}}^1$

素因数の和:496

約数の個数: 48

約数和(自身を含む): 51425280

約数和(自身を除く): 23303505

約数列:

[1, 3, 5, 11, 15, 25, 33, 55, 75, 89, 165, 267, 275, 383, 445, 825, 979, 1149, 1335, 1915, 2225, 2937, 4213, 4895, 5745, 6675, 9575, 12639, 14685, 21065, 24475, 28725, 34087, 63195, 73425, 102261, 105325, 170435, 315975, 374957, 511305, 852175, 1124871, 1874785, 2556525, 5624355, 9373925, 28121775]

約数ペア:

[(1, 28121775), (3, 9373925), (5, 5624355), (11, 2556525), (15, 1874785), (25, 1124871), (33, 852175), (55, 511305), (75, 374957), (89, 315975), (165, 170435), (267, 105325), (275, 102261), (383, 73425), (445, 63195), (825, 34087), (979, 28725), (1149, 24475), (1335, 21065), (1915, 14685), (2225, 12639), (2937, 9575), (4213, 6675), (4895, 5745)]