20270900

素因数分解:

$2^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{503}}^1$

素因数の和:561

約数の個数: 72

約数和(自身を含む): 48996864

約数和(自身を除く): 28725964

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 31, 50, 52, 62, 65, 100, 124, 130, 155, 260, 310, 325, 403, 503, 620, 650, 775, 806, 1006, 1300, 1550, 1612, 2012, 2015, 2515, 3100, 4030, 5030, 6539, 8060, 10060, 10075, 12575, 13078, 15593, 20150, 25150, 26156, 31186, 32695, 40300, 50300, 62372, 65390, 77965, 130780, 155930, 163475, 202709, 311860, 326950, 389825, 405418, 653900, 779650, 810836, 1013545, 1559300, 2027090, 4054180, 5067725, 10135450, 20270900]

約数ペア:

[(1, 20270900), (2, 10135450), (4, 5067725), (5, 4054180), (10, 2027090), (13, 1559300), (20, 1013545), (25, 810836), (26, 779650), (31, 653900), (50, 405418), (52, 389825), (62, 326950), (65, 311860), (100, 202709), (124, 163475), (130, 155930), (155, 130780), (260, 77965), (310, 65390), (325, 62372), (403, 50300), (503, 40300), (620, 32695), (650, 31186), (775, 26156), (806, 25150), (1006, 20150), (1300, 15593), (1550, 13078), (1612, 12575), (2012, 10075), (2015, 10060), (2515, 8060), (3100, 6539), (4030, 5030)]