19919360

素因数分解:

$2^9\times 5^1\times {\mathrm{31}}^1\times {\mathrm{251}}^1$

素因数の和:305

約数の個数: 80

約数和(自身を含む): 49496832

約数和(自身を除く): 29577472

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 64, 80, 124, 128, 155, 160, 248, 251, 256, 310, 320, 496, 502, 512, 620, 640, 992, 1004, 1240, 1255, 1280, 1984, 2008, 2480, 2510, 2560, 3968, 4016, 4960, 5020, 7781, 7936, 8032, 9920, 10040, 15562, 15872, 16064, 19840, 20080, 31124, 32128, 38905, 39680, 40160, 62248, 64256, 77810, 79360, 80320, 124496, 128512, 155620, 160640, 248992, 311240, 321280, 497984, 622480, 642560, 995968, 1244960, 1991936, 2489920, 3983872, 4979840, 9959680, 19919360]

約数ペア:

[(1, 19919360), (2, 9959680), (4, 4979840), (5, 3983872), (8, 2489920), (10, 1991936), (16, 1244960), (20, 995968), (31, 642560), (32, 622480), (40, 497984), (62, 321280), (64, 311240), (80, 248992), (124, 160640), (128, 155620), (155, 128512), (160, 124496), (248, 80320), (251, 79360), (256, 77810), (310, 64256), (320, 62248), (496, 40160), (502, 39680), (512, 38905), (620, 32128), (640, 31124), (992, 20080), (1004, 19840), (1240, 16064), (1255, 15872), (1280, 15562), (1984, 10040), (2008, 9920), (2480, 8032), (2510, 7936), (2560, 7781), (3968, 5020), (4016, 4960)]