21888760

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{83}}^1\times {\mathrm{347}}^1$

素因数の和:460

約数の個数: 64

約数和(自身を含む): 52617600

約数和(自身を除く): 30728840

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 83, 95, 152, 166, 190, 332, 347, 380, 415, 664, 694, 760, 830, 1388, 1577, 1660, 1735, 2776, 3154, 3320, 3470, 6308, 6593, 6940, 7885, 12616, 13186, 13880, 15770, 26372, 28801, 31540, 32965, 52744, 57602, 63080, 65930, 115204, 131860, 144005, 230408, 263720, 288010, 547219, 576020, 1094438, 1152040, 2188876, 2736095, 4377752, 5472190, 10944380, 21888760]

約数ペア:

[(1, 21888760), (2, 10944380), (4, 5472190), (5, 4377752), (8, 2736095), (10, 2188876), (19, 1152040), (20, 1094438), (38, 576020), (40, 547219), (76, 288010), (83, 263720), (95, 230408), (152, 144005), (166, 131860), (190, 115204), (332, 65930), (347, 63080), (380, 57602), (415, 52744), (664, 32965), (694, 31540), (760, 28801), (830, 26372), (1388, 15770), (1577, 13880), (1660, 13186), (1735, 12616), (2776, 7885), (3154, 6940), (3320, 6593), (3470, 6308)]