18691840

素因数分解:

$2^8\times 5^1\times {\mathrm{17}}^1\times {\mathrm{859}}^1$

素因数の和:897

約数の個数: 72

約数和(自身を含む): 47461680

約数和(自身を除く): 28769840

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 40, 64, 68, 80, 85, 128, 136, 160, 170, 256, 272, 320, 340, 544, 640, 680, 859, 1088, 1280, 1360, 1718, 2176, 2720, 3436, 4295, 4352, 5440, 6872, 8590, 10880, 13744, 14603, 17180, 21760, 27488, 29206, 34360, 54976, 58412, 68720, 73015, 109952, 116824, 137440, 146030, 219904, 233648, 274880, 292060, 467296, 549760, 584120, 934592, 1099520, 1168240, 1869184, 2336480, 3738368, 4672960, 9345920, 18691840]

約数ペア:

[(1, 18691840), (2, 9345920), (4, 4672960), (5, 3738368), (8, 2336480), (10, 1869184), (16, 1168240), (17, 1099520), (20, 934592), (32, 584120), (34, 549760), (40, 467296), (64, 292060), (68, 274880), (80, 233648), (85, 219904), (128, 146030), (136, 137440), (160, 116824), (170, 109952), (256, 73015), (272, 68720), (320, 58412), (340, 54976), (544, 34360), (640, 29206), (680, 27488), (859, 21760), (1088, 17180), (1280, 14603), (1360, 13744), (1718, 10880), (2176, 8590), (2720, 6872), (3436, 5440), (4295, 4352)]