28151720

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{73}}^1\times {\mathrm{311}}^1$

素因数の和:426

約数の個数: 64

約数和(自身を含む): 66493440

約数和(自身を除く): 38341720

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 73, 124, 146, 155, 248, 292, 310, 311, 365, 584, 620, 622, 730, 1240, 1244, 1460, 1555, 2263, 2488, 2920, 3110, 4526, 6220, 9052, 9641, 11315, 12440, 18104, 19282, 22630, 22703, 38564, 45260, 45406, 48205, 77128, 90520, 90812, 96410, 113515, 181624, 192820, 227030, 385640, 454060, 703793, 908120, 1407586, 2815172, 3518965, 5630344, 7037930, 14075860, 28151720]

約数ペア:

[(1, 28151720), (2, 14075860), (4, 7037930), (5, 5630344), (8, 3518965), (10, 2815172), (20, 1407586), (31, 908120), (40, 703793), (62, 454060), (73, 385640), (124, 227030), (146, 192820), (155, 181624), (248, 113515), (292, 96410), (310, 90812), (311, 90520), (365, 77128), (584, 48205), (620, 45406), (622, 45260), (730, 38564), (1240, 22703), (1244, 22630), (1460, 19282), (1555, 18104), (2263, 12440), (2488, 11315), (2920, 9641), (3110, 9052), (4526, 6220)]