19850740

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^2\times {\mathrm{839}}^1$

素因数の和:881

約数の個数: 72

約数和(自身を含む): 51649920

約数和(自身を除く): 31799180

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 52, 65, 70, 91, 130, 140, 169, 182, 260, 338, 364, 455, 676, 839, 845, 910, 1183, 1678, 1690, 1820, 2366, 3356, 3380, 4195, 4732, 5873, 5915, 8390, 10907, 11746, 11830, 16780, 21814, 23492, 23660, 29365, 43628, 54535, 58730, 76349, 109070, 117460, 141791, 152698, 218140, 283582, 305396, 381745, 567164, 708955, 763490, 992537, 1417910, 1526980, 1985074, 2835820, 3970148, 4962685, 9925370, 19850740]

約数ペア:

[(1, 19850740), (2, 9925370), (4, 4962685), (5, 3970148), (7, 2835820), (10, 1985074), (13, 1526980), (14, 1417910), (20, 992537), (26, 763490), (28, 708955), (35, 567164), (52, 381745), (65, 305396), (70, 283582), (91, 218140), (130, 152698), (140, 141791), (169, 117460), (182, 109070), (260, 76349), (338, 58730), (364, 54535), (455, 43628), (676, 29365), (839, 23660), (845, 23492), (910, 21814), (1183, 16780), (1678, 11830), (1690, 11746), (1820, 10907), (2366, 8390), (3356, 5915), (3380, 5873), (4195, 4732)]