21459998

素因数分解:

$2^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{197}}^1\times {\mathrm{251}}^1$

素因数の和:488

約数の個数: 32

約数和(自身を含む): 38320128

約数和(自身を除く): 16860130

約数列:

[1, 2, 7, 14, 31, 62, 197, 217, 251, 394, 434, 502, 1379, 1757, 2758, 3514, 6107, 7781, 12214, 15562, 42749, 49447, 54467, 85498, 98894, 108934, 346129, 692258, 1532857, 3065714, 10729999, 21459998]

約数ペア:

[(1, 21459998), (2, 10729999), (7, 3065714), (14, 1532857), (31, 692258), (62, 346129), (197, 108934), (217, 98894), (251, 85498), (394, 54467), (434, 49447), (502, 42749), (1379, 15562), (1757, 12214), (2758, 7781), (3514, 6107)]