21191156

素因数分解:

$2^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{653}}^1$

素因数の和:744

約数の個数: 48

約数和(自身を含む): 45413760

約数和(自身を除く): 24222604

約数列:

[1, 2, 4, 7, 14, 19, 28, 38, 61, 76, 122, 133, 244, 266, 427, 532, 653, 854, 1159, 1306, 1708, 2318, 2612, 4571, 4636, 8113, 9142, 12407, 16226, 18284, 24814, 32452, 39833, 49628, 79666, 86849, 159332, 173698, 278831, 347396, 557662, 756827, 1115324, 1513654, 3027308, 5297789, 10595578, 21191156]

約数ペア:

[(1, 21191156), (2, 10595578), (4, 5297789), (7, 3027308), (14, 1513654), (19, 1115324), (28, 756827), (38, 557662), (61, 347396), (76, 278831), (122, 173698), (133, 159332), (244, 86849), (266, 79666), (427, 49628), (532, 39833), (653, 32452), (854, 24814), (1159, 18284), (1306, 16226), (1708, 12407), (2318, 9142), (2612, 8113), (4571, 4636)]