19963580

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{1567}}^1$

素因数の和:1603

約数の個数: 72

約数和(自身を含む): 52553088

約数和(自身を除く): 32589508

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 49, 52, 65, 70, 91, 98, 130, 140, 182, 196, 245, 260, 364, 455, 490, 637, 910, 980, 1274, 1567, 1820, 2548, 3134, 3185, 6268, 6370, 7835, 10969, 12740, 15670, 20371, 21938, 31340, 40742, 43876, 54845, 76783, 81484, 101855, 109690, 142597, 153566, 203710, 219380, 285194, 307132, 383915, 407420, 570388, 712985, 767830, 998179, 1425970, 1535660, 1996358, 2851940, 3992716, 4990895, 9981790, 19963580]

約数ペア:

[(1, 19963580), (2, 9981790), (4, 4990895), (5, 3992716), (7, 2851940), (10, 1996358), (13, 1535660), (14, 1425970), (20, 998179), (26, 767830), (28, 712985), (35, 570388), (49, 407420), (52, 383915), (65, 307132), (70, 285194), (91, 219380), (98, 203710), (130, 153566), (140, 142597), (182, 109690), (196, 101855), (245, 81484), (260, 76783), (364, 54845), (455, 43876), (490, 40742), (637, 31340), (910, 21938), (980, 20371), (1274, 15670), (1567, 12740), (1820, 10969), (2548, 7835), (3134, 6370), (3185, 6268)]