19980468

素因数分解:

$2^2\times 3^2\times {\mathrm{23}}^1\times {\mathrm{59}}^1\times {\mathrm{409}}^1$

素因数の和:501

約数の個数: 72

約数和(自身を含む): 53726400

約数和(自身を除く): 33745932

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 23, 36, 46, 59, 69, 92, 118, 138, 177, 207, 236, 276, 354, 409, 414, 531, 708, 818, 828, 1062, 1227, 1357, 1636, 2124, 2454, 2714, 3681, 4071, 4908, 5428, 7362, 8142, 9407, 12213, 14724, 16284, 18814, 24131, 24426, 28221, 37628, 48262, 48852, 56442, 72393, 84663, 96524, 112884, 144786, 169326, 217179, 289572, 338652, 434358, 555013, 868716, 1110026, 1665039, 2220052, 3330078, 4995117, 6660156, 9990234, 19980468]

約数ペア:

[(1, 19980468), (2, 9990234), (3, 6660156), (4, 4995117), (6, 3330078), (9, 2220052), (12, 1665039), (18, 1110026), (23, 868716), (36, 555013), (46, 434358), (59, 338652), (69, 289572), (92, 217179), (118, 169326), (138, 144786), (177, 112884), (207, 96524), (236, 84663), (276, 72393), (354, 56442), (409, 48852), (414, 48262), (531, 37628), (708, 28221), (818, 24426), (828, 24131), (1062, 18814), (1227, 16284), (1357, 14724), (1636, 12213), (2124, 9407), (2454, 8142), (2714, 7362), (3681, 5428), (4071, 4908)]