19841380

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{67}}^2$

素因数の和:173

約数の個数: 72

約数和(自身を含む): 48231288

約数和(自身を除く): 28389908

約数列:

[1, 2, 4, 5, 10, 13, 17, 20, 26, 34, 52, 65, 67, 68, 85, 130, 134, 170, 221, 260, 268, 335, 340, 442, 670, 871, 884, 1105, 1139, 1340, 1742, 2210, 2278, 3484, 4355, 4420, 4489, 4556, 5695, 8710, 8978, 11390, 14807, 17420, 17956, 22445, 22780, 29614, 44890, 58357, 59228, 74035, 76313, 89780, 116714, 148070, 152626, 233428, 291785, 296140, 305252, 381565, 583570, 763130, 992069, 1167140, 1526260, 1984138, 3968276, 4960345, 9920690, 19841380]

約数ペア:

[(1, 19841380), (2, 9920690), (4, 4960345), (5, 3968276), (10, 1984138), (13, 1526260), (17, 1167140), (20, 992069), (26, 763130), (34, 583570), (52, 381565), (65, 305252), (67, 296140), (68, 291785), (85, 233428), (130, 152626), (134, 148070), (170, 116714), (221, 89780), (260, 76313), (268, 74035), (335, 59228), (340, 58357), (442, 44890), (670, 29614), (871, 22780), (884, 22445), (1105, 17956), (1139, 17420), (1340, 14807), (1742, 11390), (2210, 8978), (2278, 8710), (3484, 5695), (4355, 4556), (4420, 4489)]