20440980

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{16223}}^1$

素因数の和:16245

約数の個数: 72

約数和(自身を含む): 70866432

約数和(自身を除く): 50425452

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 60, 63, 70, 84, 90, 105, 126, 140, 180, 210, 252, 315, 420, 630, 1260, 16223, 32446, 48669, 64892, 81115, 97338, 113561, 146007, 162230, 194676, 227122, 243345, 292014, 324460, 340683, 454244, 486690, 567805, 584028, 681366, 730035, 973380, 1022049, 1135610, 1362732, 1460070, 1703415, 2044098, 2271220, 2920140, 3406830, 4088196, 5110245, 6813660, 10220490, 20440980]

約数ペア:

[(1, 20440980), (2, 10220490), (3, 6813660), (4, 5110245), (5, 4088196), (6, 3406830), (7, 2920140), (9, 2271220), (10, 2044098), (12, 1703415), (14, 1460070), (15, 1362732), (18, 1135610), (20, 1022049), (21, 973380), (28, 730035), (30, 681366), (35, 584028), (36, 567805), (42, 486690), (45, 454244), (60, 340683), (63, 324460), (70, 292014), (84, 243345), (90, 227122), (105, 194676), (126, 162230), (140, 146007), (180, 113561), (210, 97338), (252, 81115), (315, 64892), (420, 48669), (630, 32446), (1260, 16223)]