19913940

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{317}}^1\times {\mathrm{349}}^1$

素因数の和:681

約数の個数: 72

約数和(自身を含む): 60769800

約数和(自身を除く): 40855860

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 317, 349, 634, 698, 951, 1047, 1268, 1396, 1585, 1745, 1902, 2094, 2853, 3141, 3170, 3490, 3804, 4188, 4755, 5235, 5706, 6282, 6340, 6980, 9510, 10470, 11412, 12564, 14265, 15705, 19020, 20940, 28530, 31410, 57060, 62820, 110633, 221266, 331899, 442532, 553165, 663798, 995697, 1106330, 1327596, 1659495, 1991394, 2212660, 3318990, 3982788, 4978485, 6637980, 9956970, 19913940]

約数ペア:

[(1, 19913940), (2, 9956970), (3, 6637980), (4, 4978485), (5, 3982788), (6, 3318990), (9, 2212660), (10, 1991394), (12, 1659495), (15, 1327596), (18, 1106330), (20, 995697), (30, 663798), (36, 553165), (45, 442532), (60, 331899), (90, 221266), (180, 110633), (317, 62820), (349, 57060), (634, 31410), (698, 28530), (951, 20940), (1047, 19020), (1268, 15705), (1396, 14265), (1585, 12564), (1745, 11412), (1902, 10470), (2094, 9510), (2853, 6980), (3141, 6340), (3170, 6282), (3490, 5706), (3804, 5235), (4188, 4755)]