21320560

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{8597}}^1$

素因数の和:8641

約数の個数: 40

約数和(自身を含む): 51175296

約数和(自身を除く): 29854736

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 248, 310, 496, 620, 1240, 2480, 8597, 17194, 34388, 42985, 68776, 85970, 137552, 171940, 266507, 343880, 533014, 687760, 1066028, 1332535, 2132056, 2665070, 4264112, 5330140, 10660280, 21320560]

約数ペア:

[(1, 21320560), (2, 10660280), (4, 5330140), (5, 4264112), (8, 2665070), (10, 2132056), (16, 1332535), (20, 1066028), (31, 687760), (40, 533014), (62, 343880), (80, 266507), (124, 171940), (155, 137552), (248, 85970), (310, 68776), (496, 42985), (620, 34388), (1240, 17194), (2480, 8597)]