19787300

素因数分解:

$2^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{491}}^1$

素因数の和:549

約数の個数: 72

約数和(自身を含む): 47830272

約数和(自身を除く): 28042972

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, 491, 620, 650, 775, 806, 982, 1300, 1550, 1612, 1964, 2015, 2455, 3100, 4030, 4910, 6383, 8060, 9820, 10075, 12275, 12766, 15221, 20150, 24550, 25532, 30442, 31915, 40300, 49100, 60884, 63830, 76105, 127660, 152210, 159575, 197873, 304420, 319150, 380525, 395746, 638300, 761050, 791492, 989365, 1522100, 1978730, 3957460, 4946825, 9893650, 19787300]

約数ペア:

[(1, 19787300), (2, 9893650), (4, 4946825), (5, 3957460), (10, 1978730), (13, 1522100), (20, 989365), (25, 791492), (26, 761050), (31, 638300), (50, 395746), (52, 380525), (62, 319150), (65, 304420), (100, 197873), (124, 159575), (130, 152210), (155, 127660), (260, 76105), (310, 63830), (325, 60884), (403, 49100), (491, 40300), (620, 31915), (650, 30442), (775, 25532), (806, 24550), (982, 20150), (1300, 15221), (1550, 12766), (1612, 12275), (1964, 10075), (2015, 9820), (2455, 8060), (3100, 6383), (4030, 4910)]