21470900

素因数分解:

$2^2\times 5^2\times {\mathrm{11}}^1\times {\mathrm{131}}^1\times {\mathrm{149}}^1$

素因数の和:305

約数の個数: 72

約数和(自身を含む): 51559200

約数和(自身を除く): 30088300

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 25, 44, 50, 55, 100, 110, 131, 149, 220, 262, 275, 298, 524, 550, 596, 655, 745, 1100, 1310, 1441, 1490, 1639, 2620, 2882, 2980, 3275, 3278, 3725, 5764, 6550, 6556, 7205, 7450, 8195, 13100, 14410, 14900, 16390, 19519, 28820, 32780, 36025, 39038, 40975, 72050, 78076, 81950, 97595, 144100, 163900, 195190, 214709, 390380, 429418, 487975, 858836, 975950, 1073545, 1951900, 2147090, 4294180, 5367725, 10735450, 21470900]

約数ペア:

[(1, 21470900), (2, 10735450), (4, 5367725), (5, 4294180), (10, 2147090), (11, 1951900), (20, 1073545), (22, 975950), (25, 858836), (44, 487975), (50, 429418), (55, 390380), (100, 214709), (110, 195190), (131, 163900), (149, 144100), (220, 97595), (262, 81950), (275, 78076), (298, 72050), (524, 40975), (550, 39038), (596, 36025), (655, 32780), (745, 28820), (1100, 19519), (1310, 16390), (1441, 14900), (1490, 14410), (1639, 13100), (2620, 8195), (2882, 7450), (2980, 7205), (3275, 6556), (3278, 6550), (3725, 5764)]