21997976

素因数分解:

$2^3\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{67}}^1$

素因数の和:145

約数の個数: 128

約数和(自身を含む): 57576960

約数和(自身を除く): 35578984

約数列:

[1, 2, 4, 7, 8, 11, 13, 14, 22, 26, 28, 41, 44, 52, 56, 67, 77, 82, 88, 91, 104, 134, 143, 154, 164, 182, 268, 286, 287, 308, 328, 364, 451, 469, 533, 536, 572, 574, 616, 728, 737, 871, 902, 938, 1001, 1066, 1144, 1148, 1474, 1742, 1804, 1876, 2002, 2132, 2296, 2747, 2948, 3157, 3484, 3608, 3731, 3752, 4004, 4264, 5159, 5494, 5863, 5896, 6097, 6314, 6968, 7462, 8008, 9581, 10318, 10988, 11726, 12194, 12628, 14924, 19162, 19229, 20636, 21976, 23452, 24388, 25256, 29848, 30217, 35711, 38324, 38458, 41041, 41272, 46904, 48776, 60434, 67067, 71422, 76648, 76916, 82082, 120868, 134134, 142844, 153832, 164164, 211519, 241736, 249977, 268268, 285688, 328328, 392821, 423038, 499954, 536536, 785642, 846076, 999908, 1571284, 1692152, 1999816, 2749747, 3142568, 5499494, 10998988, 21997976]

約数ペア:

[(1, 21997976), (2, 10998988), (4, 5499494), (7, 3142568), (8, 2749747), (11, 1999816), (13, 1692152), (14, 1571284), (22, 999908), (26, 846076), (28, 785642), (41, 536536), (44, 499954), (52, 423038), (56, 392821), (67, 328328), (77, 285688), (82, 268268), (88, 249977), (91, 241736), (104, 211519), (134, 164164), (143, 153832), (154, 142844), (164, 134134), (182, 120868), (268, 82082), (286, 76916), (287, 76648), (308, 71422), (328, 67067), (364, 60434), (451, 48776), (469, 46904), (533, 41272), (536, 41041), (572, 38458), (574, 38324), (616, 35711), (728, 30217), (737, 29848), (871, 25256), (902, 24388), (938, 23452), (1001, 21976), (1066, 20636), (1144, 19229), (1148, 19162), (1474, 14924), (1742, 12628), (1804, 12194), (1876, 11726), (2002, 10988), (2132, 10318), (2296, 9581), (2747, 8008), (2948, 7462), (3157, 6968), (3484, 6314), (3608, 6097), (3731, 5896), (3752, 5863), (4004, 5494), (4264, 5159)]