999499520

素因数分解:

$2^8\times 5^1\times {\mathrm{31}}^1\times {\mathrm{25189}}^1$

素因数の和:25241

約数の個数: 72

約数和(自身を含む): 2471441280

約数和(自身を除く): 1471941760

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 64, 80, 124, 128, 155, 160, 248, 256, 310, 320, 496, 620, 640, 992, 1240, 1280, 1984, 2480, 3968, 4960, 7936, 9920, 19840, 25189, 39680, 50378, 100756, 125945, 201512, 251890, 403024, 503780, 780859, 806048, 1007560, 1561718, 1612096, 2015120, 3123436, 3224192, 3904295, 4030240, 6246872, 6448384, 7808590, 8060480, 12493744, 15617180, 16120960, 24987488, 31234360, 32241920, 49974976, 62468720, 99949952, 124937440, 199899904, 249874880, 499749760, 999499520]

約数ペア:

[(1, 999499520), (2, 499749760), (4, 249874880), (5, 199899904), (8, 124937440), (10, 99949952), (16, 62468720), (20, 49974976), (31, 32241920), (32, 31234360), (40, 24987488), (62, 16120960), (64, 15617180), (80, 12493744), (124, 8060480), (128, 7808590), (155, 6448384), (160, 6246872), (248, 4030240), (256, 3904295), (310, 3224192), (320, 3123436), (496, 2015120), (620, 1612096), (640, 1561718), (992, 1007560), (1240, 806048), (1280, 780859), (1984, 503780), (2480, 403024), (3968, 251890), (4960, 201512), (7936, 125945), (9920, 100756), (19840, 50378), (25189, 39680)]