21856240

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{1259}}^1$

素因数の和:1310

約数の個数: 80

約数和(自身を含む): 59996160

約数和(自身を除く): 38139920

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 31, 35, 40, 56, 62, 70, 80, 112, 124, 140, 155, 217, 248, 280, 310, 434, 496, 560, 620, 868, 1085, 1240, 1259, 1736, 2170, 2480, 2518, 3472, 4340, 5036, 6295, 8680, 8813, 10072, 12590, 17360, 17626, 20144, 25180, 35252, 39029, 44065, 50360, 70504, 78058, 88130, 100720, 141008, 156116, 176260, 195145, 273203, 312232, 352520, 390290, 546406, 624464, 705040, 780580, 1092812, 1366015, 1561160, 2185624, 2732030, 3122320, 4371248, 5464060, 10928120, 21856240]

約数ペア:

[(1, 21856240), (2, 10928120), (4, 5464060), (5, 4371248), (7, 3122320), (8, 2732030), (10, 2185624), (14, 1561160), (16, 1366015), (20, 1092812), (28, 780580), (31, 705040), (35, 624464), (40, 546406), (56, 390290), (62, 352520), (70, 312232), (80, 273203), (112, 195145), (124, 176260), (140, 156116), (155, 141008), (217, 100720), (248, 88130), (280, 78058), (310, 70504), (434, 50360), (496, 44065), (560, 39029), (620, 35252), (868, 25180), (1085, 20144), (1240, 17626), (1259, 17360), (1736, 12590), (2170, 10072), (2480, 8813), (2518, 8680), (3472, 6295), (4340, 5036)]