19578220

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{89}}^1\times {\mathrm{647}}^1$

素因数の和:762

約数の個数: 48

約数和(自身を含む): 44089920

約数和(自身を除く): 24511700

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 89, 170, 178, 340, 356, 445, 647, 890, 1294, 1513, 1780, 2588, 3026, 3235, 6052, 6470, 7565, 10999, 12940, 15130, 21998, 30260, 43996, 54995, 57583, 109990, 115166, 219980, 230332, 287915, 575830, 978911, 1151660, 1957822, 3915644, 4894555, 9789110, 19578220]

約数ペア:

[(1, 19578220), (2, 9789110), (4, 4894555), (5, 3915644), (10, 1957822), (17, 1151660), (20, 978911), (34, 575830), (68, 287915), (85, 230332), (89, 219980), (170, 115166), (178, 109990), (340, 57583), (356, 54995), (445, 43996), (647, 30260), (890, 21998), (1294, 15130), (1513, 12940), (1780, 10999), (2588, 7565), (3026, 6470), (3235, 6052)]