221990000

素因数分解:

$2^4\times 5^4\times {\mathrm{79}}^1\times {\mathrm{281}}^1$

素因数の和:388

約数の個数: 100

約数和(自身を含む): 546200160

約数和(自身を除く): 324210160

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 79, 80, 100, 125, 158, 200, 250, 281, 316, 395, 400, 500, 562, 625, 632, 790, 1000, 1124, 1250, 1264, 1405, 1580, 1975, 2000, 2248, 2500, 2810, 3160, 3950, 4496, 5000, 5620, 6320, 7025, 7900, 9875, 10000, 11240, 14050, 15800, 19750, 22199, 22480, 28100, 31600, 35125, 39500, 44398, 49375, 56200, 70250, 79000, 88796, 98750, 110995, 112400, 140500, 158000, 175625, 177592, 197500, 221990, 281000, 351250, 355184, 395000, 443980, 554975, 562000, 702500, 790000, 887960, 1109950, 1405000, 1775920, 2219900, 2774875, 2810000, 4439800, 5549750, 8879600, 11099500, 13874375, 22199000, 27748750, 44398000, 55497500, 110995000, 221990000]

約数ペア:

[(1, 221990000), (2, 110995000), (4, 55497500), (5, 44398000), (8, 27748750), (10, 22199000), (16, 13874375), (20, 11099500), (25, 8879600), (40, 5549750), (50, 4439800), (79, 2810000), (80, 2774875), (100, 2219900), (125, 1775920), (158, 1405000), (200, 1109950), (250, 887960), (281, 790000), (316, 702500), (395, 562000), (400, 554975), (500, 443980), (562, 395000), (625, 355184), (632, 351250), (790, 281000), (1000, 221990), (1124, 197500), (1250, 177592), (1264, 175625), (1405, 158000), (1580, 140500), (1975, 112400), (2000, 110995), (2248, 98750), (2500, 88796), (2810, 79000), (3160, 70250), (3950, 56200), (4496, 49375), (5000, 44398), (5620, 39500), (6320, 35125), (7025, 31600), (7900, 28100), (9875, 22480), (10000, 22199), (11240, 19750), (14050, 15800)]