19956560

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{619}}^1$

素因数の和:676

約数の個数: 80

約数和(自身を含む): 51663360

約数和(自身を除く): 31706800

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 31, 40, 52, 62, 65, 80, 104, 124, 130, 155, 208, 248, 260, 310, 403, 496, 520, 619, 620, 806, 1040, 1238, 1240, 1612, 2015, 2476, 2480, 3095, 3224, 4030, 4952, 6190, 6448, 8047, 8060, 9904, 12380, 16094, 16120, 19189, 24760, 32188, 32240, 38378, 40235, 49520, 64376, 76756, 80470, 95945, 128752, 153512, 160940, 191890, 249457, 307024, 321880, 383780, 498914, 643760, 767560, 997828, 1247285, 1535120, 1995656, 2494570, 3991312, 4989140, 9978280, 19956560]

約数ペア:

[(1, 19956560), (2, 9978280), (4, 4989140), (5, 3991312), (8, 2494570), (10, 1995656), (13, 1535120), (16, 1247285), (20, 997828), (26, 767560), (31, 643760), (40, 498914), (52, 383780), (62, 321880), (65, 307024), (80, 249457), (104, 191890), (124, 160940), (130, 153512), (155, 128752), (208, 95945), (248, 80470), (260, 76756), (310, 64376), (403, 49520), (496, 40235), (520, 38378), (619, 32240), (620, 32188), (806, 24760), (1040, 19189), (1238, 16120), (1240, 16094), (1612, 12380), (2015, 9904), (2476, 8060), (2480, 8047), (3095, 6448), (3224, 6190), (4030, 4952)]