21329020

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{37}}^2\times {\mathrm{41}}^1$

素因数の和:143

約数の個数: 72

約数和(自身を含む): 49638960

約数和(自身を除く): 28309940

約数列:

[1, 2, 4, 5, 10, 19, 20, 37, 38, 41, 74, 76, 82, 95, 148, 164, 185, 190, 205, 370, 380, 410, 703, 740, 779, 820, 1369, 1406, 1517, 1558, 2738, 2812, 3034, 3116, 3515, 3895, 5476, 6068, 6845, 7030, 7585, 7790, 13690, 14060, 15170, 15580, 26011, 27380, 28823, 30340, 52022, 56129, 57646, 104044, 112258, 115292, 130055, 144115, 224516, 260110, 280645, 288230, 520220, 561290, 576460, 1066451, 1122580, 2132902, 4265804, 5332255, 10664510, 21329020]

約数ペア:

[(1, 21329020), (2, 10664510), (4, 5332255), (5, 4265804), (10, 2132902), (19, 1122580), (20, 1066451), (37, 576460), (38, 561290), (41, 520220), (74, 288230), (76, 280645), (82, 260110), (95, 224516), (148, 144115), (164, 130055), (185, 115292), (190, 112258), (205, 104044), (370, 57646), (380, 56129), (410, 52022), (703, 30340), (740, 28823), (779, 27380), (820, 26011), (1369, 15580), (1406, 15170), (1517, 14060), (1558, 13690), (2738, 7790), (2812, 7585), (3034, 7030), (3116, 6845), (3515, 6068), (3895, 5476)]