18994912

素因数分解:

$2^5\times {\mathrm{37}}^1\times {\mathrm{61}}^1\times {\mathrm{263}}^1$

素因数の和:371

約数の個数: 48

約数和(自身を含む): 39184992

約数和(自身を除く): 20190080

約数列:

[1, 2, 4, 8, 16, 32, 37, 61, 74, 122, 148, 244, 263, 296, 488, 526, 592, 976, 1052, 1184, 1952, 2104, 2257, 4208, 4514, 8416, 9028, 9731, 16043, 18056, 19462, 32086, 36112, 38924, 64172, 72224, 77848, 128344, 155696, 256688, 311392, 513376, 593591, 1187182, 2374364, 4748728, 9497456, 18994912]

約数ペア:

[(1, 18994912), (2, 9497456), (4, 4748728), (8, 2374364), (16, 1187182), (32, 593591), (37, 513376), (61, 311392), (74, 256688), (122, 155696), (148, 128344), (244, 77848), (263, 72224), (296, 64172), (488, 38924), (526, 36112), (592, 32086), (976, 19462), (1052, 18056), (1184, 16043), (1952, 9731), (2104, 9028), (2257, 8416), (4208, 4514)]