18981690

素因数分解:

$2^1\times 3^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{409}}^1$

素因数の和:456

約数の個数: 128

約数和(自身を含む): 59512320

約数和(自身を除く): 40530630

約数列:

[1, 2, 3, 5, 6, 7, 10, 13, 14, 15, 17, 21, 26, 30, 34, 35, 39, 42, 51, 65, 70, 78, 85, 91, 102, 105, 119, 130, 170, 182, 195, 210, 221, 238, 255, 273, 357, 390, 409, 442, 455, 510, 546, 595, 663, 714, 818, 910, 1105, 1190, 1227, 1326, 1365, 1547, 1785, 2045, 2210, 2454, 2730, 2863, 3094, 3315, 3570, 4090, 4641, 5317, 5726, 6135, 6630, 6953, 7735, 8589, 9282, 10634, 12270, 13906, 14315, 15470, 15951, 17178, 20859, 23205, 26585, 28630, 31902, 34765, 37219, 41718, 42945, 46410, 48671, 53170, 69530, 74438, 79755, 85890, 90389, 97342, 104295, 111657, 146013, 159510, 180778, 186095, 208590, 223314, 243355, 271167, 292026, 372190, 451945, 486710, 542334, 558285, 632723, 730065, 903890, 1116570, 1265446, 1355835, 1460130, 1898169, 2711670, 3163615, 3796338, 6327230, 9490845, 18981690]

約数ペア:

[(1, 18981690), (2, 9490845), (3, 6327230), (5, 3796338), (6, 3163615), (7, 2711670), (10, 1898169), (13, 1460130), (14, 1355835), (15, 1265446), (17, 1116570), (21, 903890), (26, 730065), (30, 632723), (34, 558285), (35, 542334), (39, 486710), (42, 451945), (51, 372190), (65, 292026), (70, 271167), (78, 243355), (85, 223314), (91, 208590), (102, 186095), (105, 180778), (119, 159510), (130, 146013), (170, 111657), (182, 104295), (195, 97342), (210, 90389), (221, 85890), (238, 79755), (255, 74438), (273, 69530), (357, 53170), (390, 48671), (409, 46410), (442, 42945), (455, 41718), (510, 37219), (546, 34765), (595, 31902), (663, 28630), (714, 26585), (818, 23205), (910, 20859), (1105, 17178), (1190, 15951), (1227, 15470), (1326, 14315), (1365, 13906), (1547, 12270), (1785, 10634), (2045, 9282), (2210, 8589), (2454, 7735), (2730, 6953), (2863, 6630), (3094, 6135), (3315, 5726), (3570, 5317), (4090, 4641)]