78627940

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{163}}^1\times {\mathrm{271}}^1$

素因数の和:532

約数の個数: 48

約数和(自身を含む): 168618240

約数和(自身を除く): 89990300

約数列:

[1, 2, 4, 5, 10, 20, 89, 163, 178, 271, 326, 356, 445, 542, 652, 815, 890, 1084, 1355, 1630, 1780, 2710, 3260, 5420, 14507, 24119, 29014, 44173, 48238, 58028, 72535, 88346, 96476, 120595, 145070, 176692, 220865, 241190, 290140, 441730, 482380, 883460, 3931397, 7862794, 15725588, 19656985, 39313970, 78627940]

約数ペア:

[(1, 78627940), (2, 39313970), (4, 19656985), (5, 15725588), (10, 7862794), (20, 3931397), (89, 883460), (163, 482380), (178, 441730), (271, 290140), (326, 241190), (356, 220865), (445, 176692), (542, 145070), (652, 120595), (815, 96476), (890, 88346), (1084, 72535), (1355, 58028), (1630, 48238), (1780, 44173), (2710, 29014), (3260, 24119), (5420, 14507)]