28018730

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{67}}^1\times {\mathrm{71}}^1$

素因数の和:195

約数の個数: 64

約数和(自身を含む): 56401920

約数和(自身を除く): 28383190

約数列:

[1, 2, 5, 10, 19, 31, 38, 62, 67, 71, 95, 134, 142, 155, 190, 310, 335, 355, 589, 670, 710, 1178, 1273, 1349, 2077, 2201, 2546, 2698, 2945, 4154, 4402, 4757, 5890, 6365, 6745, 9514, 10385, 11005, 12730, 13490, 20770, 22010, 23785, 39463, 41819, 47570, 78926, 83638, 90383, 147467, 180766, 197315, 209095, 294934, 394630, 418190, 451915, 737335, 903830, 1474670, 2801873, 5603746, 14009365, 28018730]

約数ペア:

[(1, 28018730), (2, 14009365), (5, 5603746), (10, 2801873), (19, 1474670), (31, 903830), (38, 737335), (62, 451915), (67, 418190), (71, 394630), (95, 294934), (134, 209095), (142, 197315), (155, 180766), (190, 147467), (310, 90383), (335, 83638), (355, 78926), (589, 47570), (670, 41819), (710, 39463), (1178, 23785), (1273, 22010), (1349, 20770), (2077, 13490), (2201, 12730), (2546, 11005), (2698, 10385), (2945, 9514), (4154, 6745), (4402, 6365), (4757, 5890)]