20200420

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{59}}^1$

素因数の和:157

約数の個数: 96

約数和(自身を含む): 48988800

約数和(自身を除く): 28788380

約数列:

[1, 2, 4, 5, 10, 17, 19, 20, 34, 38, 53, 59, 68, 76, 85, 95, 106, 118, 170, 190, 212, 236, 265, 295, 323, 340, 380, 530, 590, 646, 901, 1003, 1007, 1060, 1121, 1180, 1292, 1615, 1802, 2006, 2014, 2242, 3127, 3230, 3604, 4012, 4028, 4484, 4505, 5015, 5035, 5605, 6254, 6460, 9010, 10030, 10070, 11210, 12508, 15635, 17119, 18020, 19057, 20060, 20140, 22420, 31270, 34238, 38114, 53159, 59413, 62540, 68476, 76228, 85595, 95285, 106318, 118826, 171190, 190570, 212636, 237652, 265795, 297065, 342380, 381140, 531590, 594130, 1010021, 1063180, 1188260, 2020042, 4040084, 5050105, 10100210, 20200420]

約数ペア:

[(1, 20200420), (2, 10100210), (4, 5050105), (5, 4040084), (10, 2020042), (17, 1188260), (19, 1063180), (20, 1010021), (34, 594130), (38, 531590), (53, 381140), (59, 342380), (68, 297065), (76, 265795), (85, 237652), (95, 212636), (106, 190570), (118, 171190), (170, 118826), (190, 106318), (212, 95285), (236, 85595), (265, 76228), (295, 68476), (323, 62540), (340, 59413), (380, 53159), (530, 38114), (590, 34238), (646, 31270), (901, 22420), (1003, 20140), (1007, 20060), (1060, 19057), (1121, 18020), (1180, 17119), (1292, 15635), (1615, 12508), (1802, 11210), (2006, 10070), (2014, 10030), (2242, 9010), (3127, 6460), (3230, 6254), (3604, 5605), (4012, 5035), (4028, 5015), (4484, 4505)]